MySQL创建和删除表操作命令实例讲解

CREATE TABLE person (
number INT(11),
name VARCHAR(255),
birthday DATE
);

CREATE TABLE IF NOT EXISTS person (
number INT(11),
name VARCHAR(255),
birthday DATE
);

SHOW CREATE table person;

CREATE TABLE `person` (
  `number` int(11) DEFAULT NULL,
  `name` varchar(255) DEFAULT NULL,
  `birthday` date DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=utf8;

SHOW FULL COLUMNS from person;
+----------+--------------+-----------------+------+-----+---------+-------+---------------------------------+---------+
| Field    | Type         | Collation       | Null | Key | Default | Extra | Privileges                      | Comment |
+----------+--------------+-----------------+------+-----+---------+-------+---------------------------------+---------+
| number   | int(11)      | NULL            | YES  |     | NULL    |       | select,insert,update,references |         |
| name     | varchar(255) | utf8_general_ci | YES  |     | NULL    |       | select,insert,update,references |         |
| birthday | date         | NULL            | YES  |     | NULL    |       | select,insert,update,references |         |
+----------+--------------+-----------------+------+-----+---------+-------+---------------------------------+---------+

CREATE TEMPORARY TABLE temp_person (
number INT(11),
name VARCHAR(255),
birthday DATE
);

CREATE TABLE IF NOT EXISTS person2 (
number INT(11),
name VARCHAR(255),
birthday DATE
);

CREATE TABLE new_tbl SELECT * FROM orig_tbl;

mysql> SELECT * FROM foo;
+---+
| n |
+---+
| 1 |
+---+
mysql> CREATE TABLE bar (m INT) SELECT n FROM foo;
mysql> SELECT * FROM bar;
+------+---+
| m    | n |
+------+---+
| NULL | 1 |
+------+---+

CREATE TABLE foo (a TINYINT NOT NULL) SELECT b+1 AS a FROM bar;

CREATE TABLE new_tbl LIKE orig_tbl;

CREATE TABLE `people` (
  `peopleid` smallint(6) NOT NULL AUTO_INCREMENT,
  `firstname` char(50) NOT NULL,
  `lastname` char(50) NOT NULL,
  `age` smallint(6) NOT NULL,
  `townid` smallint(6) NOT NULL,
  PRIMARY KEY (`peopleid`),
  UNIQUE KEY `unique_fname_lname`(`firstname`,`lastname`),
  KEY `fname_lname_age` (`firstname`,`lastname`,`age`)
) ;

DROP TABLE  tbl_name;

DROP TABLE IF EXISTS tbl_name;