sql中修改字符串类型的字段可以这么拼接:update tbName set UserName=\'abc\'+UserName;
但mysql中就不行了,需要这样:update tbName set UserName=CONCAT(\'abc\',UserName);
把查询出来的多个值,赋值给多个变量,
sql:SELECT @oldOrderId=M_ORDERID,@oldParentId=M_PARENTID,@oldOrderPath=M_ORDERPATH FROM S_Menu WHERE M_ID=id;
mysql:SELECT M_ORDERID,M_PARENTID,M_ORDERPATH INTO oldOrderId,oldParentId,oldOrderPath FROM S_Menu WHERE M_ID=id;
sql中声明变量要加@,mysql中不用加@。