ms sql server递归查询

表结构

CREATE TABLE District (

DisCode VARCHAR(10),

DisName VARCHAR(10),

DisFatherCode VARCHAR(10),

HasChild BIT

)

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代码

;WITH AllDiscodes AS (

--递归查询出@discode的父级地域，用于筛选最匹配的打折信息

SELECT discode,

d.DisFatherCode

FROM District d

WHERE d.DisCode = '652324522218'

UNION ALL

SELECT d.discode,

d.DisFatherCode

FROM District d

INNER JOIN AllDiscodes ad

ON d.discode = ad.DisFatherCode

)SELECT * FROM alldiscodes

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复杂一点，树形结构表和其他表有关联




代码

--复杂一点，树形结构表和其他表有关联

;WITH targets AS (

SELECT DISTINCT t.TargetCode,

t.TargetFatherCode,

t.TargetName,

t.Haschild

FROM [Target] t

INNER JOIN CropTarget ct

ON t.TargetCode = ct.TargetCode

AND ct.CropClassCode = 'zw00010001'

UNION ALL

SELECT t.TargetCode,

t.TargetFatherCode,

t.TargetName,

t.Haschild

FROM [Target] t

INNER JOIN targets ts

ON ts.TargetFatherCode = t.targetcode

)

SELECT DISTINCT ts.*,t.TargetName AS TargetFatherName

FROM targets ts left JOIN [Target] t ON ts.targetfathercode=t.TargetCode

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