MySQL檢查表是否存在錯誤

Question

我想檢查一個表是否已經存在，但是我無法得到這個工作。

IF EXISTS (SELECT 1 
    FROM sysobjects 
    WHERE xtype='u' AND name='tablename') 
     SELECT 'table already exists.' 
ELSE 
BEGIN 
    CREATE TABLE Week_(
      id INT(10)AUTO_INCREMENT PRIMARY KEY (id), 
      ... 
      ...) 
      END; 

我的錯誤：

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'IF EXISTS (SELECT 1 FROM sysobjects WHERE xtype='u' AND name' at line 1

有人可以幫助我？

在此先感謝

Answer 1

在MySQL中，你可以使用下面的語法：

CREATE TABLE IF NOT EXISTS 

http://dev.mysql.com/doc/refman/5.1/en/create-table.html

Answer 2

試試這個：

SELECT * 
FROM information_schema.TABLES 
WHERE TABLE_SCHEMA = 'DBName' AND TABLE_NAME = 'TableName' 

OR

CREATE TABLE IF NOT EXISTS 'TableName'