SQL匹配度查詢

SELECT (IF(LOCATE('RK', SJXBSF), 2, 0)+IF(LOCATE('SJ', SJXBSF), 2, 0)) ppd,o.* FROM db_sjx  o WHERE  ( (SJXBSF LIKE '%RK%') blog OR (SJXBSF LIKE '%SJ%')  ) it ORDER BY ppd desc,LENGTH(SJXBSF) asc limi

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