sp_help 如何在 MySQL 中显示字段类型和外键约束?
在 MySQL 中,可借助 SHOW CREATE 命令实现 sp_help。
情况 1 −
对于表,语法如下 −
SHOW CREATE TABLE yourTableName;
情况 2 −
对于存储过程,语法如下 −
SHOW CREATE PROCEDURE yourProcedureName;
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) ); Query OK, 0 rows affected (0.97 sec)
为该表执行上面的语法 −
mysql> SHOW CREATE TABLE DemoTable;
这将生成如下输出,其中显示了字段名称和约束 −
+---------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | 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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