SQLには何が問題なのですか？

Question

CREATE TABLE IF NOT EXISTS customers (customer_id TEXT NOT NULL, time_stamp TIMESTAMP NOT NULL, customer_info TEXT), PRIMARY KEY (time_stamp)

エラーが

mysql> CREATE TABLE IF NOT EXISTS customers (customer_id TEXT NOT NULL, time_stamp TIMESTAMP NOT NULL, 
     customer_info TEXT), PRIMARY KEY (time_stamp); 
ERROR 1064 (42000): 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 ' PRIMARY KEY (time_stamp)' at line 1 

Answer 1

主キー列がCREATE TABLE括弧内で定義する必要がある：

CREATE TABLE IF NOT EXISTS customers (
    customer_id TEXT NOT NULL, 
    time_stamp TIMESTAMP NOT NULL, 
    customer_info TEXT, 
    PRIMARY KEY (time_stamp) 
) 

あなたがcustomer_idインデックス可能にしなかった理由を、私は好奇心が強いですデータ型、したがって主キー列...