mysql> alter table employee change depno depno int(5) not null; 加索引 mysql> alter table 表名 add index 索引名 (字段名1[,字段名2 …]); 例子: 代码如下 复制代码 mysql> alter table employee add index emp_name (name); 加主关键字的索引 mysql> alter table 表名 add primary key (字段...
This statement can be used to change the characteristics of a stored function. More than one change may be specified in an ALTER FUNCTION statement. However, you cannot change the parameters or body of a stored function using this statement; to make such changes, you must drop and re-create...
This statement can be used to change the characteristics of a stored function. More than one change may be specified in anALTER FUNCTIONstatement. However, you cannot change the parameters or body of a stored function using this statement; to make such changes, you must drop and re-create th...
select min(stocks),max(stocks) from stock; select char_length('hello mysql'); 语法 create function 函数名[(参数列表)] returns 返回类型 begin 代码 end drop function if exists get_stocks; delimiter $$ create function get_stocks(id varchar(3)) returns int begin set @s = (select stocks fro...
(HY000) at line 1: Incorrect key file for table 'TX_INFO'; try to repair it I viewed the code, in MySQL5.7.22: in function 'Encryption::decrypt(...)': /* Do nothing if it's not an encrypted table. */ if (!is_encrypted_page(src)) { return(DB_SUCCESS); } while in MySQL...
MySQL [test]> alter table t1 add PRIMARY KEY (`id`); ERROR 1235 (0A000): Not supported feature or function MySQL [test]> alter table t1 drop primary key; ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your OceanBase version for the...
Local versions of our user manual (French, for example) contains next syntax: ALTER PROCEDURE | FUNCTION sp_name [characteristic ...] characteristic: NAME newname | SQL SECURITY {DEFINER | INVOKER} | COMMENT string (http://dev.mysql.com/doc/refman/5.0/fr/alter-procedure.html) So it seems...
⚈ Replicating the table is optional; it has no function on Slaves. ⚈ It was not intended to JOIN this table with any other; I don't know if "left_off_*" is useful. The table must be CREATEd before the Layer has the code in it that looks at the table. The imporant value (...
Default values must be constants. This means, for example, that you cannot set the default for a date column to be the value of a function such asNOW( )orCURRENT_DATE. KEYis a synonym forINDEX. In MySQL, aUNIQUEkey can have only distinct values. An error occurs if you try to add ...
I think I have the right user permissions, I have the 'show view' and 'create view' privileges for user, and I don't see any other ones for views in the 'Schema Privileges' in mysqladministrator under the heading 'Users and privileges'. The view is simple enough and I have read ...