sp_help for MySQL显示字段类型和外键约束？

  • Z时代
  • 2024-01-10
  • 分类：综合

在MySQL中，可以借助SHOW CREATE命令来实现sp_help。

案例1 -

对于表，语法如下-

SHOW CREATE TABLE yourTableName;

案例2 -

对于存储过程，语法如下-

SHOW CREATE PROCEDURE yourProcedureName;

让我们首先创建一个表-

mysql> create table DemoTable
(
   EmployeeId int NOT NULL AUTO_INCREMENT,
   EmployeeFirstName varchar(40) NOT NULL,
   EmployeeLastName varchar(40) NOT NULL,
   EmployeeAge int,
   EmployeeCountryName varchar(40),
   EmployeeCityName varchar(40),
   PRIMARY KEY(EmployeeId),
   UNIQUE KEY(EmployeeFirstName,EmployeeCityName)
);

让我们为表实现以上语法-

mysql> SHOW CREATE TABLE DemoTable;

这将产生以下显示字段名称和约束的输出-

+---------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Table         | Create Table 
+---------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| DemoTable     | CREATE TABLE `demotable` (`EmployeeId` int(11) NOT NULL AUTO_INCREMENT, `EmployeeFirstName` varchar(40) COLLATE utf8_unicode_ci NOT NULL, `EmployeeLastName` varchar(40) COLLATE utf8_unicode_ci NOT NULL, `EmployeeAge` int(11) DEFAULT NULL, `EmployeeCountryName` varchar(40) COLLATE utf8_unicode_ci DEFAULT NULL, `EmployeeCityName` varchar(40) COLLATE utf8_unicode_ci DEFAULT NULL, PRIMARY KEY (`EmployeeId`), UNIQUE KEY `EmployeeFirstName` (`EmployeeFirstName`,`EmployeeCityName`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci |
+---------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.03 sec)

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