MySQL 自定义函数CREATE FUNCTION示例
mysql>
mysql>delimiter$$
mysql>
mysql>CREATEFUNCTIONmyFunction
->(in_stringVARCHAR(255),
->in_find_strVARCHAR(20),
->in_repl_strVARCHAR(20))
->
->RETURNSVARCHAR(255)
->BEGIN
->DECLAREl_new_stringVARCHAR(255);
->DECLAREl_find_posINT;
->
->SETl_find_pos=INSTR(in_string,in_find_str);
->
->IF(l_find_pos>0)THEN
->SETl_new_string=INSERT(in_string,l_find_pos,LENGTH(in_find_str),in_repl_str);
->ELSE
->SETl_new_string=in_string;
->ENDIF;
->RETURN(l_new_string);
->
->END$$
QueryOK,0rowsaffected(0.00sec)
mysql>
mysql>delimiter;
mysql>selectmyFunction('ABC','A','Z');
+---------------------------+
|myFunction('ABC','A','Z')|
+---------------------------+
|ZBC|
+---------------------------+
1rowinset(0.00sec)
mysql>dropfunctionmyFunction;
QueryOK,0rowsaffected(0.00sec)热门推荐
10 八一幼儿祝福语大全简短
11 公司乔迁食堂祝福语简短
12 婚礼结束聚餐祝福语简短
13 儿媳买车妈妈祝福语简短
14 毕业送礼老师祝福语简短
15 同事辞职正常祝福语简短
16 恭贺新婚文案祝福语简短
17 金店立秋祝福语简短英文
18 婆婆高寿祝福语大全简短