SET:赋值语句,用于对变量进行赋值 SELECT…INTO:把从数据表中查询的结果存放到变量中,也就是为变量赋值 需要设置新的结束标记。 DELIMITER 新的结束标记 # 示例 DELIMITER $ CREATEPROCEDURE存储过程名(IN|OUT|INOUT参数名 参数类型,...) [characteristics ...] BEGIN sql语句1; sql
mysql>delimiter$$#将语句的结束符号从分号;临时改为两个$$(可以是自定义)mysql>CREATEPROCEDUREdelete_matches(INp_playernoINTEGER)->BEGIN->DELETEFROMMATCHES->WHEREplayerno=p_playerno; ->END$$QueryOK,0rowsaffected(0.01sec)mysql>delimiter;#将语句的结束符号恢复为分号 解析:默认情况下,存储过程和默认数据...
mysql > DELIMITER // mysql > CREATE PROCEDURE proc1 --name存储过程名 -> (IN parameter1 INTEGER) -> BEGIN -> DECLARE variable1 CHAR(10); -> IF parameter1 = 17 THEN -> SET variable1 = 'birds'; -> ELSE -> SET variable1 = 'beasts'; -> END IF; -> INSERT INTO table1 VALUES ...
Following statements create a stored procedure. By default, a procedure is associated with the default database (currently used database). To associate the procedure with a given database, specify the name as database_name.stored_procedure_name when you create it. Here is the complete syntax :...
当对数据库进行复杂操作时(如对多个表进行Update、Insert、Query、Delete时),可将此复杂操作用存储过程封装起来与数据库提供的事务处理结合一起使用。 存储过程可以重复使用,可减少数据库开发人员的工作量。 安全性高,可设定只有某此用户才具有对指定存储过程的使用权。
含义:存储过程的英文是Stored Procedure。它的思想很简单,就是一组经过预先编译的 SQL 语句的封装。 执行过程:存储过程预先存储在 MySQL 服务器上,需要执行的时候,客户端只需要向服务器端发出调用存储过程的命令,服务器端就可以把预先存储好的这一系列 SQL 语句全部执行。
For example, my stored procedure is as follows create procedure get_data(IN id int) begin declare filename varchar(10) default concat(id, ".txt"); select name, address from table where id_in_table = id INTO outfile @filename; end; This code (or any of the other variants th...
We create the procedure Pow(). We call it using the CALL statement. The result is stored in the @p variable. Finally, we select the @p variable to see its content. Random numbersIn the following example, we will create a procedure which produces five random numbers. From 0 to 9. ...
mysql>delimiter$$#将语句的结束符号从分号;临时改为两个$$(可以是自定义)mysql>CREATEPROCEDUREdelete_matches(INp_playernoINTEGER)->BEGIN->DELETEFROMMATCHES->WHEREplayerno=p_playerno; ->END$$QueryOK,0rowsaffected(0.01sec)mysql>delimiter;#将语句的结束符号恢复为分号 ...
I do a select on the table to see if there are any records matching the string and, if so, I was to report out the id of the query. What I have so far is: CREATE PROCEDURE sp_GetRecordID ( IN formSecret_In varchar(50), IN tablename_In varchar(200), OUT id_Out INT...