1

我有一个像下面这样搜索的存储过程：

BEGIN
#At first, Search in name of job:
(SELECT * FROM tb_job WHERE `name` LIKE '%some%' AND `name` LIKE '%thing%')
UNION 
# second, search for tags:
(SELECT * FROM tb_job WHERE id IN 
    (
        SELECT idJob FROM
        (
            (SELECT 2 AS priority1, COUNT(tb_job_tag.idTag) AS priority2, idJob FROM tb_job_tag WHERE idTag IN
                (SELECT tb_tag.id FROM tb_tag WHERE tag LIKE '%some%' OR tag LIKE '%thing%')
            GROUP BY tb_job_tag.idJob)
        UNION
            (SELECT 1, COUNT(tb_job_tag.idTag), idJob FROM tb_job_tag WHERE idTag IN
                (SELECT tb_tag.id FROM tb_tag WHERE tag LIKE '%some%' AND tag LIKE '%thing%')
            GROUP BY tb_job_tag.idJob)
        )
        AS t ORDER BY priority1, priority2 DESC
    )
)

END

现在我有 2 个问题：如何传递一个单词数组并将它们在 mysql 中分隔并在 mysql 中使用它们LIKE？第二，我怎样才能使这个搜索更好？

（我有 3table: tb_job, tb_tag, tb_job_tag 存储作业的 id 和标签的 id）。谢谢你的帮助。

4

1 回答 1

0 
/**
 * http://www.aspdotnet-suresh.com/2013/07/sql-server-split-function-example-in.html
 */
CREATE FUNCTION dbo.Array(@String nvarchar(4000), @Delimiter char(1))
RETURNS @Results TABLE ([id] [bigint] IDENTITY(1,1) NOT NULL, Items nvarchar(4000))
AS
BEGIN
    DECLARE @INDEX INT
    DECLARE @SLICE nvarchar(4000)
    -- HAVE TO SET TO 1 SO IT DOESNT EQUAL Z
    --     ERO FIRST TIME IN LOOP
    SELECT @INDEX = 1
    WHILE @INDEX !=0
    BEGIN
    -- GET THE INDEX OF THE FIRST OCCURENCE OF THE SPLIT CHARACTER
    SELECT @INDEX = CHARINDEX(@Delimiter,@STRING)
    -- NOW PUSH EVERYTHING TO THE LEFT OF IT INTO THE SLICE VARIABLE
    IF @INDEX !=0
    SELECT @SLICE = LEFT(@STRING,@INDEX - 1)
    ELSE
    SELECT @SLICE = @STRING
    -- PUT THE ITEM INTO THE RESULTS SET
    INSERT INTO @Results(Items) VALUES(@SLICE)
    -- CHOP THE ITEM REMOVED OFF THE MAIN STRING
    SELECT @STRING = RIGHT(@STRING,LEN(@STRING) - @INDEX)
    -- BREAK OUT IF WE ARE DONE
    IF LEN(@STRING) = 0 BREAK
    END
RETURN
END

在您的数据库中执行一次此函数，然后继续访问特定值，您可以编写如下查询

 DECLARE @VALUE VARCHAR(100);
 SELECT TOP 1 @VALUE = Items FROM [dbo].[Array] ('some,thing,like,that' , ',') where id = 2
 PRINT @VALUE

您只需要更改 select 语句中的 id 即可。它现在只接受字符串值。但是您可以使用 SQL 将 String 转换为 IntCAST

如果您有任何建议/修改让我知道，我只是匆忙创建了这个功能......

于 2013-08-14T06:29:55.747 回答