今天早上我不知所措。也許我的咖啡被麻醉了?簡單的問題 - 將現有的ID導入此臨時表中進行導出。不更改行由此mySQL更新查詢生成。爲什麼?
表所示:
表人
+--------+-----------------------+
| id | email |
+--------+-----------------------+
| 142755 | [email protected] |
+--------+-----------------------+
表no_dma
+--------+------------------------+
| person | email |
+--------+------------------------+
| 0 | [email protected] |
+--------+------------------------+
查詢:
UPDATE
person, no_dma
SET no_dma.person = person.id
WHERE person.email = no_dma.email;
我已經驗證了至少一些匹配鄂麥的存在l地址在兩個表中,但更新產生
Query OK, 0 rows affected (9.31 sec)
Rows matched: 0 Changed: 0 Warnings: 0
很明顯,我今天有點d bra。
請幫我嗎?我做錯了什麼?
//編輯
每評論下面我做這些查詢:
mysql> select person, email from no_dma limit 0,1;
+--------+------------------------+
| person | email |
+--------+------------------------+
| 0 | [email protected]
+--------+------------------------+
1 row in set (0.00 sec)
mysql> select email from no_dma where email = '[email protected]';
Empty set (0.00 sec)
mysql> select email from no_dma where TRIM(email) = '[email protected]';
Empty set (0.46 sec)
兩個表具有電子郵件字段存儲與整理設置爲latin1_swedish_ci VARCHAR。
而這個查詢,WTH?
mysql> SELECT CONCAT('"',email,'"') from no_dma limit 0,3;
+-----------------------+
| CONCAT('"',email,'"') |
+-----------------------+
" |[email protected]
" |[email protected]
" |[email protected]
+-----------------------+
mysql> SELECT email from no_dma limit 0,3;
+--------------------+
| email |
+--------------------+
|[email protected]
|[email protected]
|[email protected]
+--------------------+
這是怎麼回事?看起來像換行符,但我認爲TRIM()處理這些?
mysql> SELECT TRIM(email) from no_dma limit 0,3;
+--------------------+
| TRIM(email) |
+--------------------+
|[email protected]
|[email protected]
|[email protected]
+--------------------+
3 rows in set (0.00 sec)
UPDATE:FOUND ISSUE 進口被在Windows完成生成的CSV的mysqlimport但給予精氨酸
--lines封端逐= '\ n'
重新導入數據工作正常。 對不起,浪費了時間。
您是如何驗證的?當你運行`SELECT person.id FROM person,no_dma WHERE person.email = no_dma.email`時,你會得到行嗎? – 2011-02-11 15:55:42
我想我在你的例子中看到了一個額外的空間,在no_dma.email結尾處,嘗試從no_dma`選擇CONCAT('「',email,''')來查看是否是這種情況。 – jswolf19 2011-02-11 15:56:15