MySQL查詢不返回任何東西或返回錯誤的數據

Question

我有兩張桌子。 表_1具有此字段。

table_1_id
name
image
adres

TABLE_2

table_2_id
name
email
phone
comment
datetime
need_id

我想在單擊ID_1表格table_1從table_2加載所有具有table_1_id = 1行，我已經嘗試過使用此查詢

SELECT t1*, t2.* FROM table_1 t1, table_2 t2
                 WHERE t1.table_1_id = t2.need_id ORDER BY `DateTime` DESC

並顯示空白頁。 然后我嘗試這樣

SELECT t1.*, t2.* FROM table_1 t1
 JOIN table_2 t2 ON t1.table_1_id = t2.need_id ORDER BY ` DateTime` DESC 

無論單擊什么，這都是從數據庫返回的前5個結果。

Answer 1

假設您具有ID_1 ，則無需在查詢中包含table_1 ：

SELECT * FROM table_2
WHERE need_id = ID_1 
ORDER BY `DateTime` DESC