SQL在拆分字符串后将数据插入其他表
我有一张WCA表格: 现在我想将数据移动到新表WCA_类型: 这里的ID是自动增加的SQL在拆分字符串后将数据插入其他表,sql,sql-server,Sql,Sql Server,我有一张WCA表格: 现在我想将数据移动到新表WCA_类型: 这里的ID是自动增加的 如何在MS sql server中编写sql,将旧表中的类型拆分为多类型,并将其插入新表。您可以使用递归cte-例如 CREATE TABLE #WCA_TYPE (ID INT IDENTITY(1, 1) PRIMARY KEY ,WCA_ID INT ,TYPE INT); WITH sampleData(WCA_ID, TYPE) AS ( SEL
如何在MS sql server中编写sql,将旧表中的类型拆分为多类型,并将其插入新表。您可以使用递归cte-例如
CREATE TABLE #WCA_TYPE
(ID INT IDENTITY(1, 1) PRIMARY KEY
,WCA_ID INT
,TYPE INT);
WITH sampleData(WCA_ID, TYPE) AS
(
SELECT
*
FROM ( VALUES ('1', '1*3*5')
,('2', '1*5')
) nTab(nCol1, nCol2)
)
,rep(WCA_ID, item, delim) AS
(
SELECT
WCA_ID
,TYPE item
,'*' delim
FROM sampleData
UNION ALL
SELECT
WCA_ID
,LEFT(item, CHARINDEX(delim, item, 1) - 1) item
,delim
FROM rep
WHERE (CHARINDEX(delim, item, 1) > 0)
UNION ALL
SELECT
WCA_ID
,RIGHT(item, LEN(item) - CHARINDEX(delim, item, 1)) item
,delim
FROM rep
WHERE (CHARINDEX(delim, item, 1) > 0)
)
INSERT #WCA_TYPE
(TYPE
,WCA_ID)
SELECT
item
,WCA_ID
FROM rep
WHERE (CHARINDEX(delim, item, 1) = 0)
ORDER BY WCA_ID
OPTION (MAXRECURSION 0);
SELECT * FROM #WCA_TYPE;
假设“您的类型”列始终有3位数字,则可以使用此选项
INSERT INTO wca_type (WCA_id,type)
SELECT 1,SUBSTRING(CONVERT(nvarchar(MAX),type),1,1) FROM wca
UNION ALL
SELECT 1,SUBSTRING(CONVERT(nvarchar(MAX),type),2,1) FROM wca
UNION ALL
SELECT 1,SUBSTRING(CONVERT(nvarchar(MAX),type),3,1) FROM wca
在WCA表中,它有许多类型列格式相同的记录。您的脚本是否仅用于特定记录?它可能有多个数字
CREATE TABLE #WCA_TYPE
(ID INT IDENTITY(1, 1) PRIMARY KEY
,WCA_ID INT
,TYPE INT);
WITH sampleData(WCA_ID, TYPE) AS
(
SELECT
*
FROM ( VALUES ('1', '1*3*5')
,('2', '1*5')
) nTab(nCol1, nCol2)
)
,rep(WCA_ID, item, delim) AS
(
SELECT
WCA_ID
,TYPE item
,'*' delim
FROM sampleData
UNION ALL
SELECT
WCA_ID
,LEFT(item, CHARINDEX(delim, item, 1) - 1) item
,delim
FROM rep
WHERE (CHARINDEX(delim, item, 1) > 0)
UNION ALL
SELECT
WCA_ID
,RIGHT(item, LEN(item) - CHARINDEX(delim, item, 1)) item
,delim
FROM rep
WHERE (CHARINDEX(delim, item, 1) > 0)
)
INSERT #WCA_TYPE
(TYPE
,WCA_ID)
SELECT
item
,WCA_ID
FROM rep
WHERE (CHARINDEX(delim, item, 1) = 0)
ORDER BY WCA_ID
OPTION (MAXRECURSION 0);
SELECT * FROM #WCA_TYPE;
DECLARE @CurID INT, @MaxID INT, @t VARCHAR(200)
SELECT @CurID = 1, @MaxID = MAX(ID) FROM WCA
WHILE @CurID <= @MaxID
BEGIN
SELECT @t = TYPE
FROM WCA
WHERE ID = @CurID
;WITH Pieces([Pos], [start], [stop]) AS (
SELECT 1, 1, CHARINDEX('*', @t)
UNION ALL
SELECT [Pos] + 1, [stop] + 1, CHARINDEX('*', @t, [stop] + 1)
FROM Pieces
WHERE [stop] > 0
)
INSERT INTO WCA_TYPE(WCA_ID, TYPE)
SELECT @CurID, T.Value
FROM
( SELECT [Pos], SUBSTRING(@t, start, CASE WHEN [stop] > 0 THEN [stop]-[start] ELSE 4000 END) AS [Value]
FROM Pieces
) T
WHERE T.Value <> ''
SET @CurID = @CurID + 1
END
SELECT *
FROM WCA_TYPE
INSERT INTO wca_type (WCA_id,type)
SELECT 1,SUBSTRING(CONVERT(nvarchar(MAX),type),1,1) FROM wca
UNION ALL
SELECT 1,SUBSTRING(CONVERT(nvarchar(MAX),type),2,1) FROM wca
UNION ALL
SELECT 1,SUBSTRING(CONVERT(nvarchar(MAX),type),3,1) FROM wca
WITH CTE AS
(
select id,Type,0 as startPos,
CHARINDEX('*',TYPE)-1 as endPos from WCA
UNION ALL
select id,Type,endPos+2 as startPos,
CHARINDEX('*',TYPE,endPos+2)-1 as endPos from CTE
where CHARINDEX('*',TYPE,endPos+2)>0
)
INSERT INTO WCA_TYPE (WCA_ID, TYPE)
select ID,
CASE WHEN EndPos>0
THEN
Substring(Type,StartPos,EndPos-StartPos+1)
else
Type
end as Type
from CTE
where EndPos<>0