[英]Insert inside recursive CTE in SQL Server
I have a table that has a parent-child record relationship across two fields.我有一个表,它在两个字段之间具有父子记录关系。 I wrote a query with a recursive cte that returns all child records to a particular one.
我使用递归 cte 编写了一个查询,该查询将所有子记录返回到特定记录。 Now I need to insert them to another table where the parent-child relation is set using the Recorded, ParentId fields.
现在我需要将它们插入到另一个表中,在该表中使用 Recorded、ParentId 字段设置父子关系。 RecordId is identifier, primary key.
RecordId 是标识符,主键。 Is there any way to do an insert inside the CTE so that a identifier (RecordId) appears that I can use when getting (and inserting) child records as ParentId?
有什么方法可以在 CTE 中进行插入,以便在获取(和插入)子记录作为 ParentId 时可以使用标识符 (RecordId)?
Source table schema:源表架构:
CREATE TABLE dbo.table1
(
PartIndex1 nvarchar(30) NOT NULL,
PartName1 nvarchar(30) NOT NULL,
PartType nvarchar(5) NOT NULL,
PartIndex2 nvarchar(30) NOT NULL,
PartName2 nvarchar(30) NOT NULL,
Qty int NOT NULL,
CONSTRAINT PK_table1 PRIMARY KEY CLUSTERED (PartIndex1, PartName1, PartType, PartIndex2, PartName2, Qty)
) ON [PRIMARY]
GO
Sample data script:示例数据脚本:
INSERT INTO dbo.table1(PartIndex1, PartName1, PartType, PartIndex2, PartName2, Qty)
VALUES (N'PI1', N'PN001', N'B', N'PI1', N'PN002', 1)
GO
INSERT INTO dbo.table1(PartIndex1, PartName1, PartType, PartIndex2, PartName2, Qty)
VALUES (N'PI1', N'PN001', N'D', N'PI1', N'PN003', 1)
GO
INSERT INTO dbo.table1(PartIndex1, PartName1, PartType, PartIndex2, PartName2, Qty)
VALUES (N'PI1', N'PN002', N'D', N' ', N'B01', 40)
GO
INSERT INTO dbo.table1(PartIndex1, PartName1, PartType, PartIndex2, PartName2, Qty)
VALUES (N'PI1', N'PN002', N'D', N'PI1', N'PN003', 2)
GO
INSERT INTO dbo.table1(PartIndex1, PartName1, PartType, PartIndex2, PartName2, Qty)
VALUES(N'PI1', N'PN002', N'D', N'PI2', N'PN004', 1)
GO
INSERT INTO dbo.table1(PartIndex1, PartName1, PartType, PartIndex2, PartName2, Qty)
VALUES (N'PI1', N'PN006', N'B', N'PI1', N'PN002', 3)
GO
INSERT INTO dbo.table1(PartIndex1, PartName1, PartType, PartIndex2, PartName2, Qty)
VALUES (N'PI1', N'PN006', N'B', N'PI2', N'PN004', 1)
GO
INSERT INTO dbo.table1(PartIndex1, PartName1, PartType, PartIndex2, PartName2, Qty)
VALUES (N'PI1', N'PN007', N'B', N'PI1', N'PN003', 2)
GO
My recursive CTE query and result:我的递归 CTE 查询和结果:
; WITH cte AS
(SELECT
*
FROM dbo.table1
WHERE partIndex1 = 'PI1'
AND partName1 = 'PN001'
UNION ALL
SELECT
t2.*
FROM cte o
JOIN dbo.table1 t2
ON o.partIndex2 = t2.partIndex1
AND o.partName2 = t2.partName1)
SELECT
*
FROM cte
PartIndex1 PartName1 PartType PartIndex2 PartName2 Qty
------------ ---------- -------- ----------- ---------- ---
PI1 PN001 B PI1 PN002 1
PI1 PN001 D PI1 PN003 1
PI1 PN002 D B01 40
PI1 PN002 D PI1 PN003 2
PI1 PN002 D PI2 PN004 1
I have all child records of 'PN001'.我有“PN001”的所有子记录。 And I need to insert it into other table.
我需要将它插入到其他表中。
Target table:目标表:
CREATE TABLE dbo.table2
(
RecordId INT IDENTITY,
Parent INT NULL,
SetName NVARCHAR(128) NOT NULL,
PartIndex1 NVARCHAR(30) NOT NULL,
PartName1 NVARCHAR(30) NOT NULL,
PartType NVARCHAR(5) NOT NULL,
PartIndex2 NVARCHAR(30) NOT NULL,
PartName2 NVARCHAR(30) NOT NULL,
Qty INT NOT NULL,
CONSTRAINT PK_table1 PRIMARY KEY CLUSTERED (RecordId)
)
ON [PRIMARY]
GO
Expected result:预期结果:
RecordId ParentId SetName PartIndex1 PartName1 PartType PartIndex2 PartName2 Qty
--------- -------- --------- ------------ ---------- -------- ----------- ---------- ---
42351 NULL DataSet41 PI1 PN001 B PI1 PN002 1
42352 NULL DataSet41 PI1 PN001 D PI1 PN003 1
42353 42353 DataSet41 PI1 PN002 D B01 40
42354 42353 DataSet41 PI1 PN002 D PI1 PN003 2
42355 42353 DataSet41 PI1 PN002 D PI2 PN004 1
Assuming,You have already created table "dbo.table2" in your database.假设,您已经在数据库中创建了表“dbo.table2”。
You can use this query:- But,I don't know how you are getting values for ParentId.您可以使用此查询:- 但是,我不知道您如何获取 ParentId 的值。
insert into dbo.table3
( Parent,
SetName,
PartIndex1,
PartName1,
PartType,
PartIndex2,
PartName2,
Qty)
select t2.Parent,'DataSet41' as SetName,t1.PartIndex1,t1.PartName1,t1.PartType,t1.PartIndex2,
t1.PartName2,t1.Qty from dbo.table1 t1 left outer join dbo.table3 t2 on t1.partindex1=t2.partindex1
Please update how you are getting value for productid because its neither an identity column nor used in dbo.table1.请更新您如何获取 productid 的值,因为它既不是标识列,也不是在 dbo.table1 中使用。
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