SQL server数据库切割字符串，拼接字符串方法

拼接字符串：
select stuff((select ‘,’+alarmtype_name from
tb_zngk_znfx_alarmtype where alarmtype_code in (‘10’,‘11’) for xml path(’’)),1,1,’’)

切割字符串：
select value as code from
fnSplitStr((select a.arithmetic_type from tb_zngk_znfx_camera_info a where a.camera_code = ‘3707020001’),’,’);


fnSplitStr函数：
CREATE FUNCTION [dbo].[fnSplitStr] (
@sText NVARCHAR(Max),
@sDelim CHAR(1)
)

RETURNS @retArray TABLE (
value VARCHAR(100)
)
AS
BEGIN
DECLARE
@posStart BIGINT,
@posNext BIGINT,
@valLen BIGINT,
@sValue NVARCHAR(100);

IF @sDelim IS NULL
BEGIN
IF LEN(@sText)>100 SET @sText = SUBSTRING(@sText, 1, 100)

INSERT @retArray (value)
VALUES (@sText);
END
ELSE
BEGIN
SET @posStart = 1;

WHILE @posStart <= LEN(@sText)
BEGIN
SET @posNext = CHARINDEX(@sDelim, @sText, @posStart);

IF @posNext <= 0
SET @valLen = LEN(@sText) - @posStart + 1;
ELSE
SET @valLen = @posNext - @posStart;

SET @sValue = SUBSTRING(@sText, @posStart, @valLen);
SET @posStart = @posStart + @valLen + 1;

IF LEN(@sValue) > 0
BEGIN
IF LEN(@sValue)>100 SET @sValue = SUBSTRING(@sValue, 1, 100)

INSERT @retArray (value)
VALUES (@sValue);

END
END
END
RETURN
END

最终拼接查询：
SELECT
t1.camera_code,
t1.camera_name,
t2.area_code as areaCode,
t2.area_name as areaName,
(select stuff((select ‘,’+alarmtype_name from
tb_zngk_znfx_alarmtype where alarmtype_code in (
select value as code from
fnSplitStr((select a.arithmetic_type from tb_zngk_znfx_camera_info a where a.camera_code = t1.camera_code),’,’)
) for xml path(’’)),1,1,’’)) as arithmeticTypeNames
FROM
tb_zngk_znfx_camera_info t1