SQL多关键字查询 并按精确度排序

/**********SQL2005************/

--> 生成测试数据: @tb
DECLARE @tb TABLE (ID INT,CONTENT VARCHAR(100))
INSERT INTO @tb
SELECT 1,'JAVA是面对对象的语言' UNION ALL
SELECT 2,'PHP学起来比JAVA要容易点' UNION ALL
SELECT 3,'ASP比PHP用起来简单,PHP比JAVA用起来简单' UNION ALL
SELECT 4,'FLEX做出来的界面好漂亮,而且可以和ASP,PHP,JAVA结合使用' UNION ALL
SELECT 5,'ASP,PHP用来做网页都不错'

--SQL查询如下:

DECLARE @str varchar(100);
SET @str = 'ASP JAVA PHP FLEX';

SELECT * FROM @tb AS A
ORDER BY 
   (SELECT COUNT(*)
    FROM (
        SELECT B.x.value('.','varchar(50)') AS s
        FROM (SELECT CONVERT(xml,'<v>'+REPLACE(@str,' ','</v><v>')+'</v>') AS s) AS T
           CROSS APPLY T.s.nodes('//v') AS B(x)) AS T
    WHERE CHARINDEX(s,A.CONTENT) > 0) DESC

/*
ID          CONTENT
----------- ---------------------------
4           FLEX做出来的界面好漂亮,而且可以和ASP,PHP,JAVA结合使用
3           ASP比PHP用起来简单,PHP比JAVA用起来简单
5           ASP,PHP用来做网页都不错
2           PHP学起来比JAVA要容易点
1           JAVA是面对对象的语言

(5 行受影响)
*/

/**********SQL2000************/

--> 生成测试数据: @tb
DECLARE @tb TABLE (ID INT,CONTENT VARCHAR(100))
INSERT INTO @tb
SELECT 1,'JAVA是面对对象的语言' UNION ALL
SELECT 2,'PHP学起来比JAVA要容易点' UNION ALL
SELECT 3,'ASP比PHP用起来简单,PHP比JAVA用起来简单' UNION ALL
SELECT 4,'FLEX做出来的界面好漂亮,而且可以和ASP,PHP,JAVA结合使用' UNION ALL
SELECT 5,'ASP,PHP用来做网页都不错'

--SQL查询如下:

DECLARE @str varchar(100);
SET @str = 'ASP JAVA PHP FLEX';

SELECT * FROM @tb AS A
ORDER BY 
   (SELECT COUNT(*)
    FROM (SELECT SUBSTRING(@str,number,CHARINDEX(' ',@str+' ',number)-number) AS s
          FROM master.dbo.spt_values
          WHERE type = 'p' AND SUBSTRING(' '+@str,number,1) = ' '
              AND number <= LEN(@str)) AS T
    WHERE CHARINDEX(s,A.CONTENT) > 0) DESC

/*
ID          CONTENT
----------- ------------------------
4           FLEX做出来的界面好漂亮,而且可以和ASP,PHP,JAVA结合使用
3           ASP比PHP用起来简单,PHP比JAVA用起来简单
5           ASP,PHP用来做网页都不错
2           PHP学起来比JAVA要容易点
1           JAVA是面对对象的语言

(5 行受影响)
*/

/***************其他类似方法****************************/

-> 生成测试数据表:tb

IF NOT OBJECT_ID('[tb]') IS NULL
    DROP TABLE [tb]
GO
CREATE TABLE [tb]([ID] INT,[CONTENT] NVARCHAR(40))
INSERT [tb]
SELECT 1,N'JAVA是面对对象的语言' UNION ALL
SELECT 2,N'PHP学起来比JAVA要容易点' UNION ALL
SELECT 3,N'ASP比PHP用起来简单，PHP比JAVA用起来简单' UNION ALL
SELECT 4,N'FLEX做出来的界面好漂亮，而且可以和ASP,PHP,JAVA结合使用' UNION ALL
SELECT 5,N'ASP，PHP用来做网页都不错'
GO
--SELECT * FROM [tb]

--创建对照表数据
IF NOT OBJECT_ID('[关键字对照表]') IS NULL
    DROP TABLE [关键字对照表]
GO
CREATE TABLE [关键字对照表]([ID] INT IDENTITY,[name] NVARCHAR(40))
INSERT [关键字对照表]
SELECT 'JAVA' UNION ALL
SELECT 'PHP' UNION ALL
SELECT 'ASP' UNION ALL
SELECT 'FLEX' 
GO
-->SQL查询如下:
--创建获取关键字数量的自字义函数：
IF NOT OBJECT_ID('[fn_px]') IS NULL
    DROP FUNCTION [fn_px]
GO
CREATE FUNCTION fn_px(@str NVARCHAR(100))
RETURNS INT
AS
BEGIN
    RETURN(SELECT SUM(CASE WHEN CHARINDEX(NAME,@str)>0 THEN 1 ELSE 0 END) FROM [关键字对照表])
END
GO
--调用函数查询如下:
SELECT * FROM tb ORDER BY dbo.fn_px([CONTENT]) desc
--结果：
/*
ID          CONTENT
----------- ----------------------------------------
4           FLEX做出来的界面好漂亮，而且可以和ASP,PHP,JAVA结合使用
3           ASP比PHP用起来简单，PHP比JAVA用起来简单
5           ASP，PHP用来做网页都不错
2           PHP学起来比JAVA要容易点
1           JAVA是面对对象的语言

(5 行受影响)
*/

--關鍵字數量倒序，再ID順序排列

--> 生成测试数据表:tb IF NOT OBJECT_ID('[tb]') IS NULL DROP TABLE [tb] GO CREATE TABLE [tb]([ID] INT,[CONTENT] NVARCHAR(40)) INSERT [tb] SELECT 1,N'JAVA是面对对象的语言' UNION ALL SELECT 2,N'PHP学起来比JAVA要容易点' UNION ALL SELECT 3,N'ASP比PHP用起来简单，PHP比JAVA用起来简单' UNION ALL SELECT 4,N'FLEX做出来的界面好漂亮，而且可以和ASP,PHP,JAVA结合使用' UNION ALL SELECT 5,N'ASP，PHP用来做网页都不错' GO --SELECT * FROM [tb] --创建对照表数据 IF NOT OBJECT_ID('[关键字对照表]') IS NULL DROP TABLE [关键字对照表] GO CREATE TABLE [关键字对照表]([ID] INT IDENTITY,[name] NVARCHAR(40)) INSERT [关键字对照表] SELECT 'JAVA' UNION ALL SELECT 'PHP' UNION ALL SELECT 'ASP' UNION ALL SELECT 'FLEX' GO -->SQL查询如下: --创建获取关键字数量的自字义函数： IF NOT OBJECT_ID('[fn_px]') IS NULL DROP FUNCTION [fn_px] GO CREATE FUNCTION fn_px(@str NVARCHAR(100)) RETURNS INT AS BEGIN RETURN(SELECT SUM(CASE WHEN CHARINDEX(NAME,@str)>0 THEN 1 ELSE 0 END) FROM [关键字对照表]) END GO --调用函数查询如下: SELECT * FROM tb ORDER BY dbo.fn_px([CONTENT]) DESC,ID --结果： /* ID CONTENT ----------- ---------------------------------------- 4 FLEX做出来的界面好漂亮，而且可以和ASP,PHP,JAVA结合使用 3 ASP比PHP用起来简单，PHP比JAVA用起来简单 2 PHP学起来比JAVA要容易点 5 ASP，PHP用来做网页都不错 1 JAVA是面对对象的语言 (5 行受影响) */

--> 生成测试数据: @tb
DECLARE @tb TABLE (ID INT,CONTENT VARCHAR(100))
INSERT INTO @tb
SELECT 1,'JAVA是面对对象的语言' UNION ALL
SELECT 2,'PHP学起来比JAVA要容易点' UNION ALL
SELECT 3,'ASP比PHP用起来简单,PHP比JAVA用起来简单' UNION ALL
SELECT 4,'FLEX做出来的界面好漂亮,而且可以和ASP,PHP,JAVA结合使用' UNION ALL
SELECT 5,'ASP,PHP用来做网页都不错' UNION ALL
SELECT 6,'liangck'

--SQL查询如下:

DECLARE @str varchar(100);
SET @str = 'ASP JAVA PHP FLEX';

--将关键字转成行集表

SELECT SUBSTRING(@str,number,CHARINDEX(' ',@str+' ',number)-number) AS s
INTO #tmp
FROM master.dbo.spt_values
WHERE type = 'p' AND SUBSTRING(' '+@str,number,1) = ' '
    AND number BETWEEN 1 AND LEN(@str)

--查找,排序
SELECT * FROM @tb AS A
WHERE EXISTS(SELECT * FROM #tmp 
             WHERE CHARINDEX(s,A.CONTENT) > 0)
ORDER BY 
   (SELECT COUNT(*)
    FROM #tmp
    WHERE CHARINDEX(s,A.CONTENT) > 0) DESC,
    ID;  --如果关键字出现次数一样,按ID从小到大排序.

--删除临时表
DROP TABLE #tmp;

/*
ID          CONTENT
----------- -----------------------
4           FLEX做出来的界面好漂亮,而且可以和ASP,PHP,JAVA结合使用
3           ASP比PHP用起来简单,PHP比JAVA用起来简单
5           ASP,PHP用来做网页都不错
2           PHP学起来比JAVA要容易点
1           JAVA是面对对象的语言

(5 行受影响)

*/