sql server 查询表某个字段不重复数据
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SELECT
TOP
(500) ID, Personname, Personcode, Telphone, Fraction into
temp3 FROM
Records AS
a WHERE
(LEN(Personcode) = 18 OR LEN(Personcode) = 15) AND
( NOT
EXISTS ( SELECT
1 AS
Expr1 FROM
Records WHERE
(Personname = a.Personname) AND
(Fraction > a.Fraction) OR (Personname = a.Personname) AND
(Fraction = a.Fraction) AND
(ID < a.ID))) ORDER
BY
Fraction DESC |
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