Tinyint vs boolean mysql. BOOL, BOOLEAN Description.

Tinyint vs boolean mysql Related. However, when used as a boolean, the Posso estar enganado, mas tenho a impressão de que, na prática, o padrão em MySQL é utilizar colunas do tipo TINYINT(1) para armazenar valores booleanos, true/false ou 0/1. 3 TINYINT and BIT in MySQL. These data types are synonyms. Old CakePHP bug here MySQL MySQL中的Boolean和tinyint(1)有什么区别？ 在MySQL中，我们通常使用Boolean或tinyint(1)来表示布尔值，表示真假，开关状态等等。但是，这两种类型在实际使用中到底有什么区别呢？ 阅读更多：MySQL 教程 Boolean和tinyint(1)的定义 Boolean是MySQL 5. About; BOOL and BOOLEAN are both synonyms of TINYINT(1). Why does MySQL's boolean type map to a tinyint instead of an enum? 107. Warning for weary travelers: when using TINYINT(1), CakePHP may change your values without warning. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company MySQL saves Boolean as 0 and 1 as it handles all Boolean that way. TINYINT(1) is a bit weird though. Bit(1) seems more logical, because that has to be 1 or 0, bool is, according to the specs, the same as saying tinyint(1) A tinyint column can hold values from 0 to 255 (if it is defined as unsigned) or -128 to +127 (if it is signed). 7以降でサポートされた比較的新しいデータ型であり、古いバージョンとの互換性がない可能性がある。 MySQL actually has a BOOLEAN datatype, but it's an alias for TINYINT(1). 43913006782532 seconds Did TYPECAST BOOL in 0. 431. 40566301345825 seconds Did EQUALS TRUE in 0. If the conversion is done in the compiler, there will be no difference in performance in the application. Implementation across various database systems is spotty. This flexibility allows developers to utilize boolean logic effectively What is the difference between TINYINT(1) and Boolean in MySQL - There is no difference between TINYINT(1) and Boolean. The "false" value is literally the integer 0, and the "true" value is the integer 1. What is the difference between BOOL and BOOLEAN data types in MySQL? Can BIT or TINYINT represent Booleans? Skip to main content. Multiple BIT(1) columns can be combined into bytes so they require less space than multiple TINYINT(1) columns do. 하지만 불러올때는 1, 0 으로 나와서 헤매는 경우가 있는데 이럴땐 아래와 같이 The MySQL BOOLEAN (alias BOOL, alias TINYINT(1) ) is not compatible with the pg boolean type. Regarding the TRUE or FALSE, any int (int, tinyint, smallint, bigint) value can be used as (or converted to) a boolean value. Why does MySQL's boolean type map to a tinyint instead of an enum? 108. See Boolean Literals, as well as the IS operator for testing values against a boolean. SELECT movie_id , title , CASE WHEN watched = 0 THEN 'False' ELSE 'True' END IF MySQL Boolean "tinyint(1)" holds values up to 127? 9. It is up to us which data type we want to use- values can be 1 and 0 or true and fal You may also note that, to an extent, this is MySQL's official position, as well, from their documentation: BOOL, BOOLEAN: These types are synonyms for TINYINT(1). Nonzero values are considered true: Also, the boolean literals are not such:. So from a storage size point of view, neither is better. 91. 0 リファレンスマニュアル :: 11. Personalmente sugeriría usar tinyint como preferencia, porque boolean no hace lo que crees que hace por el nombre, por In a MySQL database, I know tinyint(M) and its differences from tinyint(1) have already been discussed on this site, but I'm wondering something else. BOOL, BOOLEAN. Which MySQL data type to use for storing boolean values. BIT data type can store up to 8 bytes from My SQL version 5. Explain the difference between BOOL, TINYINT and BIT. Here is the proof: mysql> create table mytable ( -> mybool boolean not null default 0 -> ); Query OK, 0 rows affected (0. 물론 저장 할때는 TRUE, FALSE 로 저장이 가능하다. ENUM takes 1 byte (if under 255 values) or 2 bytes (up to maximum of 65,535; TinyInt takes 1 byte (maximum of 255 values) Boolean is a synonym for TinyInt; So, on the surface, they're all the same. First of all, you need to know that MySQL does not have a built-in, dedicated boolean data type. I'm going to assume you meant a tinyint (instead of int). It is very practical, then you can add true or false from a comparison in a SUM without CASE WHEN or a FILTER. You can say that both are synonyms for TINYINT(1). What is difference between Boolean and tinyint(1) in MySQL - The basic difference between Boolean and tinyint(1) is only in the naming convention. It is considered FALSE if it is 0 and TRUE otherwise. 0を想定）のBooleanとtinyintとtinyint(1)について整理します。 まず大前提として、MySQLのテーブルではBooleanはtinyintとして扱われています。 参考：MySQL :: MySQL 8. 为什么会有这个总结，因为在测试Mysql的字符串函数时发现，char 和 varchar 有些不同，网上搜索一番发现了各种char、varchar、nvarchar 类型的对比，还有一些奇奇怪怪的这里就不说了，然后我就开始了对这几种类型字符串的测试，接着就悲剧了，测试多次之后发现 mysqlでboolean型を使う時は、内部的にはtinyint(1)として扱われる。 DDLでもbooleanとしないで、tinyint(1)と明示的に書いてあげても良いのかもしれない。 MySQL TINYINT is a data type used to store integer values that are small in size. But one day I needed to split the true value to two separate values. BOOLEAN is just a synonym for TINYINT(1), and TRUE and FALSE are synonyms for 1 and 0. The tinyInt1isBit=false parameter in a JDBC URL is related to how MySQL handles the TINYINT(1) data type. Só que TINYINT acomoda até 1 byte de informação, o que não é necessário para valores booleanos. 8. No SQL Server, sempre usei o tipo BIT para isso, mas no MySQL tenho dúvidas se isso é adequado. BOOLEAN is an alias for TINYINT(1) and is stored as one byte of data. In my Entity object, I put the following: @Column(name = "column_name", columnDefinition = "BOOLEAN") private Boolean variableName; My dev environment has hibernate auto-ddl set to update, so when I deployed to dev, it created the table with column_name of type tinyint(1). As of today (2022-11-09) there are two answers to this question telling that it is "not necessary" to define it as unsigned. How to use it in WHERE clause and how to assign the value in INSERT, UPDATE queries properly?. Similarly, the values TRUE and FALSE are merely aliases for 1 and 0, respectively in MySQL. But my understanding is that it is not just "not necessary", it should be avoided. test) of type TINYINT(1) Issue the command UPDATE tbl SET test = IF( bool_col = 'TRUE', 1, 0 ), where bool_col is the column you migrated from PostgreSQL which contains the Boolean string; Drop the bool_col column; Possible Duplicate: MySql: Tinyint (2) vs tinyint(1) - Which difference? What is the difference between: TinyINT(1) TinyINT(2) TinyINT(3) TinyINT(4) Skip to main content. g. In MySQL, boolean values are represented using various data types, primarily boolean, bit(1), and tinyint(1). If you look at the MySQL documentation on BOOL types you see that it is a alias for TINYINT(1). 0. C# - MySQL Prevent TINYINT(1) to Currently I'm using Tinyint(1) to indicate Boolean values in my MySQL databases, which I really don't like that. You save nothing with BIT(1), since it still requires a full byte for storage. I would recommend for MySQL to stick with BOOL or BOOLEAN which gets stored as TINYINT(1). MySQLの中でBOOLEAN型を指定した場合、どのような扱いになるのかテーブルを作成して確認してみましょう。 CREATE TABLEで「boolean_table」テーブルを作成し、 What is the difference between MySQL BOOL and BOOLEAN column data types - BOOL and BOOLEAN both acts like TINYINT(1). A value of zero is considered false. They are both semantic overloads MySQL uses TINYINT(1) to mimic the behaviour of Boolean type, so make sure you use TINYINT(1) as the data type of your column, not TINYINT. MySQL does not have a dedicated Boolean data type. Vea esta página en el manual de MySQL. I'd definitely recommend going with SQLAlchemy Boolean and MySQL TINYINT. 19 only TINYINT(1) (no ZEROFILL, no UNSIGNED) can be treated as Boolean, other variants are not supplied with display width. sury. MySQL and MariaDB docs say that BOOLEAN is a synonym of TINYINT(1), not of TINYINT(1) UNSIGNED. BOOL : Used to store Boolean values, 0 being false and 1 being true. Nonzero values are considered true: I created a BOOLEAN column with 0 as the default value. MySQL sets them as TINYINT type. In MySQL, TINYINT is often used to represent BOOLEAN values, where 0 is considered as MySQL: BOOLEAN (aka tinyint(1)) vs BIT. tinyint in mysql is shown as boolean value in c#. 1 - Write to MySQL database without typecasting. Whenever you create a column using BOOLEAN In MySQL, boolean values are represented using various data types, primarily boolean, bit(1), and tinyint(1). So technically, numeric values . Instead, MySQL uses TINYINT(1) to represent the BOOLEAN data type. Each TINYINT(1) takes up one byte of storage and can store numeric values between -128 and 127. 1. Create another column (e. Better use "smallint" or "bit"? 1. The (1) in tinyint(1) is only for some formatting options and generally ignored. 데이터 역시 TRUE는 1, FALSE 는 0 으로 저장이 된다. This is particularly useful when creating No, there is no way you can distinguish a column that was created as BOOLEAN from a column that was created as TINYINT(1). To be entirely clear, MySQL does not have a true BOOLEAN type. If we say that we need true What is the difference between TINYINT(1) and Boolean in MySQL - There is no difference between TINYINT(1) and Boolean. Also reverting tinyint-enum of three values back to tinyint-boolean would be similarly easy. In MySQL there are three main data types: string, numeric, and date and time. So web2py adapter is incorrect. These types allow for efficient storage and retrieval of true/false Summary: in this tutorial, you will learn about MySQL BOOLEAN data type and how to use it to store Boolean values in the databases. SO in practice you will have a lot less hassles if you stick with a numeric datatype. We could add the server version check to c/J in order TINYINT(1) UNSIGNED could work with previous server versions but I think it would be better to follow the server changes and rework Currently I'm using Tinyint(1) to indicate Boolean values in my MySQL databases, which I really don't like that. Extending 0,1 to 0,1,2 was trivial, whereas changing it to string-enum would require more effort. 3 then use TINYINT or BIT is totally fine. To make it more convenient when defining BOOLEAN column, MySQL offers BOOLEAN or BOOL as the synonym for TINYINT(1). MySQL Reference Manual. ENUM does take up some metadata for the string value associated with it though In MySQL, boolean values are represented using various data types, primarily boolean, bit(1), and tinyint(1). What is the difference between tinyint, smallint, mediumint, bigint and int in MySQL? 1453. The constants TRUE and FALSE evaluate to 1 and 0, respectively. MySQL TINYINT(1) to BOOL. users for column admin. (Correction: I only see this weird behaviour in SQL-Fiddle and not when accessing MySQL locally so it may well be a SQL So I have a tinyint datatype column in my database where I store values from 0 to 2. Improve this answer. You could create it as tinyint(100) and it wouldn't make a difference. e. BOOL and tinyint(1) unsigned? 8. 7以降でサポートされた比較的新しいデータ型であり、古いバージョンとの互換性がない可能性がある。 The internal code is poorly understood. Boolean in MySQL. Un valor 0 se considera falso. Signed range is from -128 to 127. I'm using JPA with Spring Data/Hibernate 5. Doctrine returns always the same record & schema:update fails. So if you want to force two states only, go for ENUM. By the way, MySQL doesn't have a true BOOL type. MySQL - restrict tinyint column. BOOLEANHere is an example of BOOLEAN. Why does TINYINT(1) function as a I have a BOOLEAN type in a MySQL table (TINYINT(1)) and I'm trying to map the boolean field in an entity but this generates an exception: org. Here is an example: create table mytable ( mybool boolean not null default 0 ); FYI: boolean is an alias for tinyint(1). It's only like an alias, which is transformed into TINYINT(1) before it is stored in the database. Stack Overflow. . This means that, although BOOLEAN can be specified in table definitions, MySQL internally converts it to TINYINT(1). MySQL中的BOOLEAN类型和BIT类型都可以用来存储布尔值（true或false）。它们之间有一些区别和应用场景。 1. In MySQL, the type BOOLEAN is a synonym for the data type TINYINT(1). It If you use MySQL lower than 5. TINYINT : The range of this data type is -128 - +127 or 0 – 256 and occupies 1 byte. Mysql has two types that can hold boolean data, bit and bool. TINYINT columns can store numbers from -128 to 127. This means that while you can use the keywords TRUE and FALSE , you can also represent these states with numeric values: 1 for true and 0 for false. These types allow for efficient storage and retrieval of true/false values, which are essential for logical operations in databases. 比如： select 1=1; 其输出结果为1。 产品 解决方案 文档与社区 权益中心 定价 云市场 合作伙伴 支持与服 The Data Type TINYINT(1). So why MySQL interprets Boolean as TINYINT(1), but not BIT(1)? The SQL standard has included a boolean data type since 1999 - with valid values being true, false, unknown, or null. However, when I perform a query that retrieves certain information from the table where the tinyint row is true, it only works for the rows that have 1 as In MySQL, bool data type is essentially same as tinyint(1). 3版本以后引入的数据类型，它是一个可选的TRYE/FALS mysql数据类型：存储布尔值的最佳选择 在mysql中，有几种不同的数据类型可用于存储布尔值：boolean，tinyint和bit。那么，哪种数据类型最适合用于存储布尔值呢？下面我们将一一分析它们的优缺点。 阅读更多：mysql 教程 1. BOOLEAN or TINYINT to store values in MySQL - The MySQL BOOLEAN and BOOL both are equivalent to TINYINT(1). Boolean vs tinyint(1) for boolean values in MySQL. Otherwise, the difference still won't be noticeable. Should I go with ENUM or TINYINT. In other words, you can SUM() a column that is MySQLでは、厳密なBoolean型はサポートされていません。代わりに、TINYINT型を使用して真偽値を表現します。TINYINT型Boolean値を表現する場合、通常、0を偽（false）、1を真（true）として使用します。1バイトの整数型で、0から255までの値を格納でき 概要 MySQL（Ver8. It is my understanding that MySQL treats any non-zero number in a tinyint column as true (in this case 1 and 2) and the 0 as false. 6. 16-2+deb. BOOLEAN or TINYINT confusion. Share. The tinyint(1) type is often used to store boolean values, where 0 represents false and 1 represents true. Regarding the TRUE or FALSE, any int (int, tinyint, smallint, bigint) value can be used as (or converted to) a BIT(1) forces only 2 possible values : 0 and 1, while TINYINT(1) can accept any integer values less than 10 (0,1,2,3,4,5. tinyint(1): Commonly used to store boolean values, where In MySQL, boolean values are represented primarily through the tinyint(1) data type, which allows for a clear representation of true and false values. Then, for each of those columns you want to convert to native MySQL TINYINT(1):. MySQL interprets 0 as false, all other numbers are true. The keyword Bool or Boolean internally converts These types are synonyms for TINYINT (1). The keyword Bool or Boolean internally converts into TINYINT(1) or we can say Bool or Boolean are synonymous with TINYINT(1). Rails 4. Enum or Bool in mysql? 3. It is (perhaps because it is supposed to act as a BOOLEAN datatype), returns only 0 and 1 in some context, while it still keeps the stored (-128 to 127) values. BOOL, BOOLEAN Description. MySQL is actually fooling you. Could a column "REVIEWED TINYINT(5) be used to store the values of 5 different boolean checkboxes in the frontend form? I'm thinking along the lines of treating it as an array. Not changing it perpetuates the mistake. Boolean Representation. ) which can be ambiguous. But don't worry, MySQL has a clever workaround. MySQL Boolean "tinyint(1)" holds values up to 127? 8. It The web2py adapter converts boolean to char(1) but in MySQL the specification is that boolean is stored as tinyint with 0 and 1. You won't find any mention of BOOLEAN in the metadata for a column. Let us first create a table −mysql> create table DemoTable ( isMarried Boolean ); Query OK, 0 rows mysqlにおいて、ブール値（真偽値）を表すために、boolean型とtinyint(1)型の2つの選択肢があります。boolean型デメリット mysql 5. However you can store 9 in a BOOLEAN field and it will accept it. In MySQL, TRUE and FALSE map to 1 and 0 integer values. However, the values TRUE and FALSE are merely aliases for 1 and 0. In the end, neither the BIT type nor the TINYINT type are a prefect choice when representing a Boolean value within a MySQL database. A What is difference between Boolean and tinyint (1) in MySQL? The basic difference between Boolean and tinyint (1) is only in the naming convention. In MySQL, BOOLEAN is actually treated as 概要 MySQL（Ver8. You may or may not be able to port apps depending on what they use as boolean literals. HibernateException: Wrong column type in maegul. The BOOLEAN type isn't stored anywhere. 3173689842224 seconds You have to specify 0 (meaning false) or 1 (meaning true) as the default. 5. Cualquier otro valor, verdadero. Let’s break it down: TINYINT(1): In MySQL, the TINYINT data type can store integer values from -128 to 127 (signed) or 0 to 255 (unsigned). I was puzzled why a TINYINT field was being mapped to a boolean by default when updating the model from the database, until I realised someone had originally set the display value to (1) in the MySQL schema. The "unsigned" types are only available in MySQL, and the rest just use the signed ranges, with one notable exception: tinyint in SQL Server is unsigned and has a value range of 0 to 255 Share Improve this answer mysql boolean 和 tinyint 区别 在mysql中，boolean和tinyint都可以用来表示布尔类型的值。然而，在实际使用时，它们的行为有时会让人感到困惑。 阅读更多：mysql 教程 boolean 首先，我们来看一下boolean类型。在mysql中，boolean类型实际上是tinyint（1）的别名。它可以存储三种值：0、1和null（空值）。 MySQL: BOOLEAN (aka tinyint(1)) vs BIT. BOOL is just an alias for TINYINT(1), and there is no true or false value. What Data Type to Store 0, 1, -1 values only? 1. 9 その他のデータベースエンジンのデータ型の使用 じゃあtinyintは0, 1を表すのかというと 概念：boolean类型是mysql中的一个数据类型，用于存储布尔值。它可以存储三个值：true、false和null。 分类：boolean类型实际上是tinyint(1)的别名，它占用1个字节的存储空间。 优势：boolean类型在mysql中具有较好的兼容性和可读性，可以直接使用true和false进行赋值和 It turns out that CakePHP assumes that TINYINT(1) should be a boolean type, because MySQL aliases BOOL to TINYINT(1). The size parameter specifies the maximum display width (which is 255) BOOL: Zero is considered as false, nonzero values are considered as true. What is the difference betwen TINYINT(1) and Boolean in MySQL? 1. There is not really a BOOLEAN type in MySQL. 2. The boolean type can be represented using several underlying types, primarily tinyint(1) and boolean. In MySQL, boolean data types are essential for representing binary states, typically true or false. MySQL Boolean Data Types. org~wily+1 Did NOT EMPTY in 0. Thus, any "true" values (like values greater than one) are assigned to be one, and any "false" values zero. 7版本中数据表字段可用的类型. Unsigned range is from 0 to 255. Mysql数据类型TINYINT(1)与BOOLEAN踩坑记 熟悉Mysql的同学应该都知道，Mysql查询的boolean结果将输出为0或者1. How to retrieve an int value rather than a boolean from a TINYINT(1) column? 0. If MySQL goes so far as to equate TINYINT(1) with BOOLEAN, it seems like the way to go. Examples MySql 에서 BOOLEAN TYPE 은 5버전대부터 사용이 가능하다. So there is no difference. Non-zero values are considered true. When I have it back on PHP, it's TRUE, true, or simply 1, if I'm mysqlにおいて、ブール値（真偽値）を表すために、boolean型とtinyint(1)型の2つの選択肢があります。boolean型デメリット mysql 5. enum vs boolean, enum vs tinyint 어떤 차이가 있을까요? 비교 ERD를 많이 보신 분들이라면, enum('Y', 'N')을 사용하는 경우를 종종 볼 수 있습니다. 0. So, how could I store and retrieve Boolean values in my MySQL databases via PHP?. Even the way MySQL Workbench and MySQL Administrator display the BIT datatype isn't nice (it's a little symbol for binary data). Follow edited Mar 31, 2023 at 3:36. How to retrieve an int value rather than a boolean from a TINYINT(1) column? 10. Types: The boolean data type can be represented in MySQL using: boolean: A direct representation of true or false. Here's where things get a bit quirky – MySQL doesn't have a native BOOLEAN datatype! I know, I know, it sounds confusing. They told me to just use TINYINT. How do I retrieve a data type of tinyint from MySQL in C#? 15. It happened to me that I had a tinyint column to represent boolean. Alternatively, you can use BOOL or BOOLEAN which are both synonyms for TINYINT(1). Tinyint vs Bit? 10. TINYINT(size) A very small integer. Signed range is from -32768 to 32767. hibernate. Found: bit, expected: boolean MySQL Tinyint 和 Bit区别 在MySQL中，存储布尔值的两种常用数据类型是Tinyint和Bit。虽然它们都可以存储布尔值，但它们的使用有所不同。在使用时，需要根据需求选择最合适的数据类型。 阅读更多：MySQL 教程 Tinyint Tinyint是MySQL中最常用的整数类型，它占用一个字节，可以存储范围为-128到127的整数。 Sucede que cuando ingreso en el MySql WorkBeanch el atributo BOOLEAN me lo transforma en in tinyint Sera lo mismo o es diferente al boolean? En mysql, el tipo de dato tinyint(1) es sinónimo de boolean. 9 その他のデータベースエンジンのデータ型の使用 じゃあtinyintは0, 1を表すのかというと MySQLでは、厳密なBoolean型はサポートされていません。代わりに、TINYINT型を使用して真偽値を表現します。TINYINT型Boolean値を表現する場合、通常、0を偽（false）、1を真（true）として使用します。1バイトの整数型で、0から255までの値を格納できます。 You have to specify 0 (meaning false) or 1 (meaning true) as the default. BOOLEAN类型： - 概念：BOOLEAN类型是MySQL中. boolean boolean是mysql中用于表示布尔值的数据类型。 MySQL enum? ERD 설계, 엔터티 설계, DTO 설계를 할 때 고민되는 부분이 있습니다. BOOLEAN: Equal to BOOL: SMALLINT(size) A small integer. MySQL does not support a true boolean data type - BOOLEAN maps to TINYINT, which takes up only 1 byte. When I have it back on PHP, it's TRUE, true, or simply 1, if I'm MySQL里 没有 boolean类型 怎么办？tinyint(1) 总结：MySQL中 使用布尔类型的字段，就用 tinyint(1)，true 为1 false 为0. Introduction to MySQL BOOLEAN data type. The query to create a table with column boolean type. My question is what is exact difference between char(1) and tinyint(1)? I know you store character in char and store number in tinyint, but is there any significant diffrence between them? The byte sizes are same so I want to know the actual difference between them. 0 on a MySQL database. mysql> create table Demo -> ( -> isVaidUser boolean -> ); Query OK, 0 rows My two cents. ENUM('y','n') is also stored as 1 byte of data. Mysql5. 35 sec) mysql> insert into mytable values (); Query OK, 1 row boolean no es un tipo de datos distinto en MySQL; es sólo un sinónimo de tinyint. So, 2 would count as TRUE. These types are synonyms for TINYINT(1). 43936395645142 seconds Did IS NULL in 1. So instead of defining a BOOLEAN column like this: column_name TINYINT(1) Difference between BOOL and BOOLEAN types in MySQL? Hot Network Questions Why does John 19:17 include the words, "which in Aramaic is called Golgotha"? The fact is that starting from MySQL 8. Nonzero values are considered true. If we say that we need true or false values then Boolean comes to our mind, instead of tinyint(1). boolean: This is a standard type that directly represents boolean values. 실제로 BOOLEAN(BOOL) TYPE 으로 정의하면 TINYINT(1) 형식으로 정의 된다. A value of zero is considered false. 35 sec) mysql> insert into mytable values (); Query OK, 1 row 概念：boolean类型是mysql中的一个数据类型，用于存储布尔值。它可以存储三个值：true、false和null。 分类：boolean类型实际上是tinyint(1)的别名，它占用1个字节的存储空间。 优势：boolean类型在mysql中具有较好的兼容性和可读性，可以直接使用true和false进行赋值和 You could create it as tinyint(100) and it wouldn't make a difference. It looks like the pg BOOLEAN type uses string literal notation. 42750406265259 seconds Did NOT NOT in 0. Migrate them as VARCHAR(255). Instead, users have generally implemented it through the TINYINT(1) data type. It is a 1-byte integer data type, which means it can store values in the range of -128 to 127 for signed TINYINT and 0 to 255 for unsigned TINYINT. You need still to make a condition to give bak True or False, but they only text of course. The boolean type in MySQL is represented as boolean, which is an alias for tinyint(1). It doesn't have a boolean column type at all:. Considering that: Difference between BOOL and BOOLEAN types in MySQL? Hot Network Questions Why does John 19:17 include the words, "which in Aramaic is called Golgotha"? I have found that setting the display width of the column in MySQL controls whether a TINYINT will be mapped as a boolean or byte. 在MySQL中，确实没有专门的boolean数据类型。不 same result on mysql client console: According to the mysql references, mysql recognizes the keyword bool / boolean as aliases of type tinyint(1), and `true` / `false` as literals of 1 / 0. This seems to have been optimized in later versions of PHP: Current PHP Version: 5. i. vtosy rfqetq bxlt axw wqwpr xlpelx yxjsix xxlx dsbt smwb