去除数据库冗余记录

12年前
BEGIN

   DECLARE tableName VARCHAR(50);
   SET tableName=tblName;

   IF tableName='ppm.ppm_project' THEN

         DROP TABLE IF EXISTS ppm.ppm_project;

         CREATE TABLE ppm.ppm_project SELECT * FROM ppm.ppm_project_ti;

         ALTER TABLE ppm.ppm_project ADD PPM_INCREMENT BIGINT AUTO_INCREMENT UNIQUE;

         DELETE FROM ppm.ppm_project WHERE PPM_INCREMENT NOT IN (SELECT * FROM
         ( SELECT  MAX(PPM_INCREMENT) FROM ppm.ppm_project GROUP BY UPROJECTID) o );

        ALTER TABLE ppm.ppm_project DROP COLUMN PPM_INCREMENT;

ALTER TABLE ppm.ppm_project CHANGE UPROJECTID UPROJECTID varchar(100) NOT NULL PRIMARY KEY;

    END IF;