select num,id, substr(test1,0,instr(test1, ',')-1) test1, substr(test2,0,instr(test2, ',')-1) test2, substr(test3,0,instr(test3, ',')-1) test3 from table_name --前 union select num,id, substr(test1,instr(test1, ',')+1) test1, substr(test2,instr(test2, ',')+1) test2, substr(test3,instr(test3, ',')+1) test3 from ta
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