Dunno why you’d rather do this in SQL than in your application layer, but if you do, here’s one way to turn a delimited string of values back into multiple rows – just the opposite of GROUP_CONCAT:
SET @sourceString = 'a,b,c,d,e'; SET @sql = CONCAT('INSERT INTO t VALUES (\\'', REPLACE(@sourceString, ',', '\\'),(\\''), '\\')'); PREPARE myStmt FROM @sql; EXECUTE myStmt;
Just to show what’s going on:
mysql> SELECT @sql; +----------------------------------------------------+ | @sql | +----------------------------------------------------+ | INSERT INTO t VALUES ('a'),('b'),('c'),('d'),('e') | +----------------------------------------------------+
REPLACE(@sourceString, ‘,’, ‘\\’),(\\”), ‘\\’)’)…
error :-Missing Paranthesis
tell solution
Comment by SUNNY VERMA — March 20, 2019 @ 2:15 am