mysql 復制表結構和數據實例代碼，mysql和數

mysql 復制表結構和數據實例代碼，mysql和數

在mysql數據庫開發中，我們有時候需要復制或拷貝一張表結構和數據到例外一張表，這個時候我們可以使用create ... select ... from語句來實現，本文章向大家介紹mysql復制表結構和數據一個簡單實例，

 比如現在有一張表，我們要將該表復制一份，以備以後使用，那麼如何使用mysql語句來實現呢？其實我們可以直接使用create ... select ... from語句來實現，具體實現方法請看下面實例。 

我們先來創建一張Topic表，創建Topic表的SQL語句如下：

mysql> CREATE TABLE Topic(
  ->  TopicID   SMALLINT NOT NULL AUTO_INCREMENT PRIMARY KEY,
  ->  Name    VARCHAR(50) NOT NULL,
  ->  InStock   SMALLINT UNSIGNED NOT NULL,
  ->  OnOrder   SMALLINT UNSIGNED NOT NULL,
  ->  Reserved  SMALLINT UNSIGNED NOT NULL,
  ->  Department ENUM('Classical', 'Popular') NOT NULL,
  ->  Category  VARCHAR(20) NOT NULL,
  ->  RowUpdate  TIMESTAMP NOT NULL
  -> );

向Topic表中插入數據：

mysql> INSERT INTO Topic (Name,     InStock, OnOrder, Reserved, Department,  Category) VALUES
  ->          ('Java',     10,   5,    3,    'Popular',  'Rock'),
  ->          ('JavaScript',  10,   5,    3,    'Classical', 'Opera'),
  ->          ('C Sharp',    17,   4,    1,    'Popular',  'Jazz'),
  ->          ('C',       9,    4,    2,    'Classical', 'Dance'),
  ->          ('C++',      24,   2,    5,    'Classical', 'General'),
  ->          ('Perl',     16,   6,    8,    'Classical', 'Vocal'),
  ->          ('Python',    2,    25,   6,    'Popular',  'Blues'),
  ->          ('Php',      32,   3,    10,    'Popular',  'Jazz'),
  ->          ('ASP.net',    12,   15,   13,    'Popular',  'Country'),
  ->          ('VB.net',    5,    20,   10,    'Popular',  'New Age'),
  ->          ('VC.net',    24,   11,   14,    'Popular',  'New Age'),
  ->          ('UML',      42,   17,   17,    'Classical', 'General'),
  ->          ('www.java2s.com',25,   44,   28,    'Classical', 'Dance'),
  ->          ('Oracle',    32,   15,   12,    'Classical', 'General'),
  ->          ('Pl/SQL',    20,   10,   5,    'Classical', 'Opera'),
  ->          ('Sql Server',  23,   12,   8,    'Classical', 'General');
Query OK, 16 rows affected (0.00 sec)
Records: 16 Duplicates: 0 Warnings: 0

現在我們要將這張表復制一份，具體操作如下：

mysql> CREATE TABLE Topic2
  -> (
  ->  TopicID   SMALLINT NOT NULL AUTO_INCREMENT PRIMARY KEY,
  ->  Name    VARCHAR(50) NOT NULL,
  ->  InStock   SMALLINT UNSIGNED NOT NULL,
  ->  OnOrder   SMALLINT UNSIGNED NOT NULL,
  ->  Reserved  SMALLINT UNSIGNED NOT NULL,
  ->  Department ENUM('Classical', 'Popular') NOT NULL,
  ->  Category  VARCHAR(20) NOT NULL,
  ->  RowUpdate  TIMESTAMP NOT NULL
  -> )
  -> SELECT *
  -> FROM Topic

這樣表Topic2和Topic表不僅擁有相同的表結構，表數據也是一樣的了。

例外，如果我們只需要復制表結構，不需要復制數據，也可以使用create like來實現：

create table a like users;

感謝閱讀此文，希望能幫助到大家，謝謝大家對本站的支持！