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create procedure proc_batchUpdate(in categoryId integer , in artIds varchar(50))
begin
set @dsql = count('update article set type=' , categoryId , ' where id in (' , artIds , ')') ;
prepare s1 from @dsql;
execute s1;
end;



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create procedure proc_batchUpdate(in categoryId integer , in artIds varchar(50))
begin
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mysql Óï¾ä´íÎó - ÆäËûÊý¾Ý¿â¿ª·¢ / MySQL/Postgresql

CREATE PROCEDURE dowhile()
BEGIN
  DECLARE v1 INT DEFAULT 5;
  WHILE v1 > 0 DO
  SET v1 = v1 - 1;
  END WHILE;
END
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