mysql 常见错误

一.在创建存储函数时,出现错误:
 ERROR 1418 (HY000): This function has none of DETERMINISTIC, NO SQL, or READS SQLDATA in its declaration binary logging is enabled (you *might* want to use the less safe log_bin_trust_function_creators variable)
 解决方法: 1.mysql> SET GLOBAL log_bin_trust_function_creators = 1;
  2.在登录MySQL服务器是,加上 “--log-bin-trust-function-creators=1 ”参数并设置为1。
  3.一劳永逸的方法,在my.ini(my.cnf)中的[mysqld]区段中加上 log-bin-trust-function-creators=1。
   mysql> show variables like '%func%'; 
 +---------------------------------+-------+
 | Variable_name | Value |
 +---------------------------------+-------+
 | log_bin_trust_function_creators | OFF? |
 +---------------------------------+-------+
 1 row in set (0.00 sec) 
 mysql> set global log_bin_trust_function_creators=1; 
 Query OK, 0 rows affected (0.00 sec) 
 mysql> show variables like '%func%';
 +---------------------------------+-------+ 
 | Variable_name | Value |
 +---------------------------------+-------+ 
 | log_bin_trust_function_creators | ON? | 
 +---------------------------------+-------+  1 row in set (0.00 sec) 
二.在声明变量时:mysql> declare my_ sql  int default 10;
 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'declare my_sql int default 10' at line 1
 解决方法: 变量的声明(DECLARE)必须发生在BEGIN-END语句块里,而且必须发生在同一个BEGIN-END语句块里的其他命令之前。下面是变量声明(DECLARE)的语法:
DECLARE varname1, varname2, varname3,… Datatype [DEFAULT value];

 注意:必须为所有的局部变量声明它们的数据类型。如果没有使用关键字 DEFAULT 进行设定(即初始化),局部变量的初始值都将是NULL

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