CREATE PROCEDURE[dbo].[WXSP_SerializeJSON](
@ParameterSQL AS VARCHAR(MAX)
)
AS
BEGIN

DECLARE @SQL NVARCHAR(MAX)
DECLARE @XMLString VARCHAR(MAX)
DECLARE @XML XML
DECLARE @Paramlist NVARCHAR(1000)
SET @Paramlist = N‘@XML XML OUTPUT‘
SET @SQL = ‘WITH PrepareTable (XMLString)‘
SET @SQL = @SQL + ‘AS(‘
SET @SQL = @SQL + @ParameterSQL+ ‘FOR XML RAW,TYPE,ELEMENTS‘
SET @SQL = @SQL + ‘)‘
SET @SQL = @SQL + ‘SELECT @XML=[XMLString]FROM[PrepareTable]‘
EXEC sp_executesql @SQL, @Paramlist, @[email protected] OUTPUT
SET @XMLString=CAST(@XML AS VARCHAR(MAX))

DECLARE @JSON VARCHAR(MAX)
DECLARE @Row VARCHAR(MAX)
DECLARE @RowStart INT
DECLARE @RowEnd INT
DECLARE @FieldStart INT
DECLARE @FieldEnd INT
DECLARE @KEY VARCHAR(MAX)
DECLARE @Value VARCHAR(MAX)

DECLARE @StartRoot VARCHAR(100);SET @StartRoot=‘<row>‘
DECLARE @EndRoot VARCHAR(100);SET @EndRoot=‘</row>‘
DECLARE @StartField VARCHAR(100);SET @StartField=‘<‘
DECLARE @EndField VARCHAR(100);SET @EndField=‘>‘

SET @RowStart=CharIndex(@StartRoot,@XMLString,0)
SET @JSON=‘‘
WHILE @RowStart>0
BEGIN
SET @[email protected]+Len(@StartRoot)
SET @RowEnd=CharIndex(@EndRoot,@XMLString,@RowStart)
SET @Row=SubString(@XMLString,@RowStart,@[email protected])
SET @[email protected]+‘{‘

-- for each row
SET @FieldStart=CharIndex(@StartField,@Row,0)
WHILE @FieldStart>0
BEGIN
-- parse node key
SET @[email protected]+Len(@StartField)
SET @FieldEnd=CharIndex(@EndField,@Row,@FieldStart)
SET @KEY=SubString(@Row,@FieldStart,@[email protected])
SET @[email protected]+‘"‘[email protected]+‘":‘
-- parse node value
SET @[email protected]+1
SET @FieldEnd=CharIndex(‘</‘,@Row,@FieldStart)
SET @Value=SubString(@Row,@FieldStart,@[email protected])
SET @[email protected]+‘"‘[email protected]+‘",‘

SET @[email protected]+Len(@StartField)
SET @FieldEnd=CharIndex(@EndField,@Row,@FieldStart)
SET @FieldStart=CharIndex(@StartField,@Row,@FieldEnd)
END
IF LEN(@JSON)>0SET @JSON=SubString(@JSON,0,LEN(@JSON))
SET @[email protected]+‘},‘
--/ for each row

SET @RowStart=CharIndex(@StartRoot,@XMLString,@RowEnd)
END
IF LEN(@JSON)>0SET @JSON=SubString(@JSON,0,LEN(@JSON))
SET @JSON=‘[‘[email protected]+‘]‘
SELECT @JSON

END
GO

EXEC[SerializeJSON]‘SELECT*FROM[Employee_TBL]‘

将select 转为json

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原文地址：https://www.cnblogs.com/liubj-sql-json/p/11791926.html