mysql 多表联合更新

方法一：

UPDATE
yiyao_prs.prs_image_detail
LEFT JOIN
yiyao_prs.prs_prescription_app
ON
prs_image_detail.IMAGE_ID = prs_prescription_app.IMAGE_ID
SET
IS_MAIN='1'
WHERE
prs_prescription_app.SOURCE IN ('6','7','8','12')

更新更新app上传的图片使用连接方式，性能如下

方法二

UPDATE yiyao_prs.prs_image_detail
SET IS_MAIN = '1'
WHERE
   IMAGE_ID IN (
       SELECT
           a.IMAGE_ID
       FROM
           yiyao_prs.prs_prescription_app a
       WHERE
           a.SOURCE IN ('6', '7', '8', '12')
   )

性能如下