This example uses an account_balance column with a DECIMAL data type. It has a precision of 20 and a scale of 2. This means it can store 20 total digits: 18 to the left of the decimal and 2 to the right of the decimal. Example 2: Insert with Decimal This example shows how toinse...
mysql> create table t3(x decimal(65,30)); #建表成功 Query OK, 0 rows affected (0.02 sec) mysql> show tables; +---+ | Tables_in_db1 | +---+ | t1 | | t2 | | t3 | +---+ 3 rows in set (0.00 sec) mysql> insert into t1 values(1.1111111111111111111111111111111); #小数点后...
DECIMAL(x, y)can store decimal number of totalxdigits (max up to65) of whichydigits (max up to30) are allocated after the decimal point String Data Types Data TypeDescription CHAR(x)can store characters of fixed length (max8000characters) ...
COMMISSION_PCT: Commission percentage for the employee: a decimal fraction representing the percentage of the amount of sales by the employee, to be used to compute a bonus that will be added to the employee's base salary to determine the total salary. For example, 0.2 or .2 indicates a ...
Example : A table using numeric data types -- Creating a new table named "test" in the current schema CREATE TABLE test ( -- Defining a column named "id" of the DECIMAL data type, designated as the PRIMARY KEY id DECIMAL PRIMARY KEY, ...
Be sure to select the appropriate data type for your particular scenario. SQL Numeric Data Types Data TypeFromTo BIT 1 0 TINYINT 0 255 SMALLINT -32,768 32,767 INT -2,147,483,648 2,147,483,647 BIGINT -9,223,372,036,854,775,808 9,223,372,036,854,775,807 DECIMAL -10^38 + 1...
DECIMAL DOUBLE DOUBLE PRECISION ENUM FLOAT INT INTEGER LONGBLOB LONGTEXT MEDIUMBLOB MEDIUMINT MEDIUMTEXT SET DATA TYPE SMALLINT TEXT TIME TIMESTAMP TINYBLOB TINYINT TINYTEXT VARBINARY VARCHAR YEAR DATA TYPE 获取varchar 类型的帮助: ? varchar;
double *result; /* example for DOUBLE */ DECIMAL (p , s) 或 NUMERIC (p , s) 無效,因為沒有 C 語言表示法。 如果您想要傳遞十進位值,則必須將參數定義為可從 DECIMAL 強制轉型的資料類型 (例如 CHAR 或 DOUBLE) ,並明確地將引數強制轉型為此類型。 若為 DOUBLE ,您不需要將十進位引數明確強制轉...
实例1 使用CREATE DATABASE创建数据库本实例将在SQL Server服务器上创建一个数据库。该数据库包括一个主数据文件、一个用户定义文件组和一个日志文件。主数据文件在主文件组中,而用户定义文件组包含两个次要数据文件。实例代码如下:CREATE DATABASE Library ON PRIMARY --主文件和主文件组 ( NAME='Library_Primary...
CAST(expression AS data_type[(length)]) CAST()函数将任何类型的值转换为具有指定类型的值。目标类型可以是以下类型之一:BINARY,CHAR,DATE,DATETIME,TIME,DECIMAL,SIGNED,UNSIGNED。 CAST()函数通常用于返回具有指定类型的值,以便在WHERE,JOIN和HAVING子句中进行比较。