選擇同一列中有兩個不同的領域在一個查詢，

Question

我有兩個表：

CREATE TABLE sections (id int, section_name varchar(16), section_title int, section_description int); 
INSERT INTO sections VALUES(1, 'index', 1, 2); 
INSERT INTO sections VALUES(2, 'contact', 3, 4); 

CREATE TABLE texts (id int, text_value varchar(64), text_language varchar(2), text_link int); 
INSERT INTO texts VALUES(1, 'Home', 'en', 1); 
INSERT INTO texts VALUES(2, 'Inicio', 'es', 1); 
INSERT INTO texts VALUES(3, 'Welcome', 'en', 2); 
INSERT INTO texts VALUES(4, 'Bienvenidos', 'es', 2); 
INSERT INTO texts VALUES(5, 'Contact', 'en', 3); 
INSERT INTO texts VALUES(6, 'Contacto', 'es', 3); 
INSERT INTO texts VALUES(7, 'Contact Us', 'en', 4); 
INSERT INTO texts VALUES(8, 'Contactenos', 'es', 4); 

我新手使用查詢，我不知道該怎麼下一步：

SELECT `sections`.`section_title` 
    , `sections`.`section_description` 
FROM `sections` 
    INNER JOIN `texts` 
    ON (`sections`.`section_title` = `texts`.`text_link`) AND (`sections`.`section_description` = `texts`.`text_link`) 
    WHERE `sections`.`section_name` = 'index' AND `texts`.`text_language` = 'en' 
; 

MySQL返回的查詢結果爲空:(

我希望獲得使用sectionssection_name = '指數' 和textstext_language = 'EN'：。

section_title = 'Home' 
section_description = 'Welcome' 

或使用sections。 section_name ='聯繫'和texts。 text_language =「上課」：

section_title = 'Contacto' 
section_description = 'Contactenos' 

Answer 1

你需要join兩次......這樣的：

SELECT 
    t1.text_value AS section_title, 
    t2.text_value AS section_description 
FROM `sections` 
    INNER JOIN `texts` AS t1 
    ON (`sections`.`section_title` = t1.`text_link`) 
    INNER JOIN `texts` AS t2 
    ON (`sections`.`section_description` = t2.`text_link`) 
WHERE `section_name` = 'index' 
    AND t1.`text_language` = 'en' 
    AND t2.`text_language` = 'en' 

Answer 2

我編輯了上面的查詢了一下，但要低信譽做出評論= P再試一次（對我的作品）：

SELECT t1.text_value AS section_title, 
     t2.text_value AS section_description 
    FROM `sections` AS s 
INNER JOIN `texts` as t1 ON (s.`section_title` = t1.`text_link`) 
INNER JOIN `texts` as t2 ON (s.`section_description` = t2.`text_link`) 
    WHERE s.`section_name` = 'index' 
     AND t1.`text_language` = 'en' 
     AND t2.`text_language` = 'en'