把一个字符串拆分插入到临时表中
CREATE DEFINER=`root`@`localhost` PROCEDURE `p_commUsed_update_99`(p_ID_in varchar(4000),p_TD_ID_in varchar(10))
BEGIN
CREATE TEMPORARY TABLE tmp_table (SID VARCHAR(15) NOT NULL);
END;
Mysql 中把一个存储过程的参数p_ID字符串根据逗号拆分插入到临时表中
P_ID = ‘sss,www,tttt,ffff’
tmp_table
SID
Sss
www
tttt
ffff
[解决办法]
用SQL语句直接拆分不行？
[解决办法]
写一个存储过程，或者函数，把字符串进行切割插入表变量或临时表中返回就行了
[解决办法]
i 循环中使用 SUBSTRING_INDEX(SUBSTRING_INDEX(p_ID_in,p_TD_ID_in ,i),p_TD_ID_in ,-1)即可
[解决办法]
写个循环，一段段截取，或者直接拼成一个sql，prepare执行
[解决办法]
mysql> create procedure sp_testsubstring(a varchar(100))
-> begin
-> declare c int;
-> select length(a)-length(replace(a,',','')) into c;
-> select c,a;
-> while c > 0 do
-> select substring_index(a,',',1) as t;
-> set a=substring(a,instr(a,',')+1,length(a));
-> set c=c-1;
-> end while;
-> select a as t;
-> end
-> /
Query OK, 0 rows affected (0.00 sec)
mysql> call sp_testsubstring('a,b,c')/
+------+-------+
| c | a |
+------+-------+
| 2 | a,b,c |
+------+-------+
1 row in set (0.00 sec)
+------+
| t |
+------+
| a |
+------+
1 row in set (0.00 sec)
+------+
| t |
+------+
| b |
+------+
1 row in set (0.00 sec)
+------+
| t |
+------+
| c |
+------+
1 row in set (0.00 sec)
Query OK, 0 rows affected (0.00 sec)
mysql>
