---------------------------------------------------
-----           解析字符串函數                -----
---------------------------------------------------
CREATE FUNCTION [dbo].[fn_split](@p_str VARCHAR(8000), @p_split VARCHAR(10))
RETURNS @tab TABLE(tid VARCHAR(2000))
AS
BEGIN
DECLARE @idx INT
DECLARE @len INT
SELECT @len = LEN(@p_split), @idx = CHARINDEX(@p_split, @p_str, 1)
WHILE(@idx >= 1)
BEGIN
INSERT INTO @tab SELECT LEFT(@p_str, @idx - 1)
SELECT @p_str = RIGHT(@p_str, LEN(@p_str) - @idx - @len + 1), @idx = CHARINDEX(@p_split, @p_str, 1)
END
if(@p_str <> ‘‘) INSERT INTO @tab SELECT @p_str
RETURN
END;

-------------------------------
--  解析JSON字符串  --
-------------------------------
--p_jsonstr json字符串
--p_key 鍵
--返回p_key對應的值
CREATE FUNCTION [dbo].[fn_parsejson](@p_jsonstr VARCHAR(8000),
                                 @p_key VARCHAR(200)) 
RETURNS VARCHAR(3000)
AS      
BEGIN
DECLARE @rtnVal VARCHAR(3000);
  DECLARE @i INT;
  DECLARE @jsonkey VARCHAR(200);
  DECLARE @jsonvalue VARCHAR(1000);
  DECLARE @json VARCHAR(8000);
  DECLARE @tmprow VARCHAR(2000);
  DECLARE @tmpval VARCHAR(2000);
  
  IF(@p_jsonstr IS NOT NULL)
BEGIN
     SET @json = REPLACE(@p_jsonstr, ‘{‘, ‘‘);
     SET @json = REPLACE(@json, ‘}‘, ‘‘);
     SET @json = REPLACE(@json, ‘"‘, ‘‘);
DECLARE @json_cur CURSOR;  -- 聲明外層遊標
SET @json_cur = CURSOR FOR SELECT tid FROM fn_split(@json, ‘,‘);
OPEN @json_cur-- 打開遊標（外層遊標）
FETCH NEXT FROM @json_cur INTO @tmprow-- 提取外層遊標行
WHILE(@@FETCH_STATUS = 0)
BEGIN
IF(@tmprow IS NOT NULL)
BEGIN
SET @i = 0;
SET @jsonkey = ‘‘;
SET @jsonvalue = ‘‘;
DECLARE @str_cur CURSOR;-- 聲明內層遊標
SET @str_cur = CURSOR FOR SELECT tid FROM fn_split(@tmprow, ‘:‘);--第二次拆分後的遊標（內層遊標）
OPEN @str_cur  -- 打開遊標
FETCH NEXT FROM @str_cur INTO @tmpval-- 提取內層遊標行
WHILE(@@FETCH_STATUS = 0)
BEGIN
IF(@i = 0) 
BEGIN
SET @jsonkey = @tmpval
END
IF(@i = 1)
BEGIN
SET @jsonvalue = @tmpval
END
SET @i = @i + 1
FETCH NEXT FROM @str_cur into @tmpval-- 內層遊標下移一行
END
CLOSE @str_cur-- 關閉內層遊標
DEALLOCATE @str_cur -- 釋放內層遊標
IF(@jsonkey = @p_key)
BEGIN
SET @rtnVal = @jsonvalue
END
END
FETCH NEXT FROM @json_cur INTO @tmprow-- 內層遊標結束後，外層遊標下移一行
END
CLOSE @json_cur-- 關閉外層遊標
DEALLOCATE @json_cur-- 釋放外層遊標
END 
  
  RETURN @rtnVal  
END

使用示例：

Select dbo.fn_parsejson(
‘{"billPrice":"1.67","buyDate":"2009-12-30","currentStatus":"有租約",
"decoration":"精裝","empCode":"174999",","houseId":"F20BEBE259794C858C76122BCBACC71F",
"id":"36398","isAccompany":"0","isCollect":"1","isOnlyOne":"1",
"isShotProperty":"1","noCollectReason":"","parking":"0","propertyNo":"5885109",
"recordDate":"2017-06-08","recordRemark":"啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊"}‘
,‘buyDate‘)

本文出自 “風之痕_雪虎” 博客，請務必保留此出處http://snowtiger.blog.51cto.com/12931578/1942790

SQLServer 解析JSON字符串