Mysql在处理后连接两个连续表格

我的目标是在表格中显示来自DOC_sql和MDT_sql的数据。找不到应该如何实施这种联系的解决方案。Mysql在处理后连接两个连续表格

目标是搜索文档并根据匹配的标签呈现文档。

输入数据

CALL SearthDocuments('\'Book\',\'Currency\'', 'en_ENG');

代码

DELIMITER // 
CREATE PROCEDURE SearthDocuments(IN VAR_TT_names VARCHAR(255), VAR_LANG_prefix CHAR(6)) 
BEGIN 

SET @TT_sql = CONCAT('SELECT TAG_ID FROM TagTranslate WHERE TT_text IN (', VAR_TT_names, ')'); 
SET @DOC_ID_sql = CONCAT('SELECT DOC_ID FROM DocumentTag WHERE TAG_ID IN (', @TT_sql, ') GROUP BY DOC_ID HAVING COUNT(DOC_ID)'); 

SET @DOC_sql = CONCAT('SELECT * FROM VIEW_Document WHERE DOC_ID IN (', @DOC_ID_sql, ') AND LANG_prefix = "', VAR_LANG_prefix, '"'); 
SET @MDT_sql = CONCAT('SELECT DOC_ID, count(*) as TAG_HITS FROM DocumentTag WHERE TAG_ID IN (', @TT_sql, ') GROUP BY DOC_ID HAVING COUNT(DOC_ID)'); 

-- SET @COM_sql = CONCAT('?') 
-- PREPARE COM_stmt FROM @COM_sql; 
-- EXECUTE COM_stmt; 
-- DEALLOCATE PREPARE COM_stmt; 
END 
// DELIMITER ;

两个表都有标识符DOC_ID

TABLE：DOC_sql

DOC_ID, DT_ID, DT_desc, DT_title, A_name, LANG_prefix

TABLE：MDT_sql

DOC_ID, TAG_HITS

来源

2015-09-19 D. Sod

岂不是很好，如果你能说什么表看起来像 – e4c5

这是一个创建了'concat' SQL语句，并试图在两个表执行多个级联的sql语句一个weired功能。什么是表结构，数据和应该输出什么？底线：要实现的基本任务是什么？ –

这是问题的解决方案。工作代码。

DELIMITER // 
    CREATE PROCEDURE SearthDocuments(IN VAR_TT_names VARCHAR(255), VAR_LANG_prefix CHAR(3)) 
    BEGIN 

    SET @TT_sql = CONCAT('SELECT TAG_ID FROM TagTranslate WHERE TT_text IN (', VAR_TT_names, ')'); 
    SET @DOC_ID_sql = CONCAT('SELECT DOC_ID FROM DocumentTag WHERE TAG_ID IN (', @TT_sql, ') GROUP BY DOC_ID HAVING COUNT(DOC_ID)'); 

    SET @DOC_sql = CONCAT('SELECT * FROM VIEW_Document WHERE DOC_ID IN (', @DOC_ID_sql, ') AND LANG_prefix = ',VAR_LANG_prefix); 
    SET @MDT_sql = CONCAT('SELECT DOC_ID, count(*) as TAG_HITS FROM DocumentTag WHERE TAG_ID IN (', @TT_sql, ') GROUP BY DOC_ID HAVING COUNT(DOC_ID)'); 

    SET @COM_sql = CONCAT(' 
     SELECT * FROM 
     (SELECT * FROM VIEW_Document WHERE DOC_ID IN (', @DOC_ID_sql, ') AND LANG_prefix = "',VAR_LANG_prefix,'") AS V_DOC 
     LEFT JOIN 
     (SELECT DOC_ID, count(*) as TAG_HITS FROM DocumentTag WHERE TAG_ID IN (', @TT_sql ,') GROUP BY DOC_ID HAVING COUNT(DOC_ID)) as Searth 
     on V_DOC.DOC_ID = Searth.DOC_ID ORDER BY TAG_HITS DESC;' 
    ); 

    PREPARE COM_stmt FROM @COM_sql; 
    EXECUTE COM_stmt; 
    DEALLOCATE PREPARE COM_stmt; 

END 
// DELIMITER ;

来源

2015-09-21 08:21:39

Mysql在处理后连接两个连续表格

回答

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