Business requirements: The contents stored in the phone field in table A need to be updated in batches to the mobile phone number
connection table to query the correct mobile phone number and store it in the temporary table
;WITH cte AS(
SELECT a.*,b.phone AS phone1,b.ID AS userid FROM Table_A AS a LEFT JOIN Table_User_Info AS b
ON a.phone=CONVERT(VARCHAR(100),b.id) WHERE a.phone <>'' AND a.phone NOT LIKE '%*%'AND LEN(B.phone)=11
)SELECT * FROM cte
在表中新增一个finalphone字段,内容为空,最后将正确信息更新进finalphone字段中
At this time, the phone1 field is the last mobile phone number that should be updated
批量更新
;WITH cte AS(
SELECT a.*,b.phone AS phone1,b.ID AS userid FROM Table_A AS a LEFT JOIN Table_User_Info AS b
ON a.phone=CONVERT(VARCHAR(100),b.id) WHERE a.phone <>'' AND a.phone NOT LIKE '%*%'AND LEN(B.phone)=11
)UPDATE cte SET FinalPhone= phone1 WHERE phone1 IS NOT NULL
update completed
