通过操作数据库语句，然后判断返回值，如果为fasle，就执行CREATE TABLE IF NOT EXISTS `db_database_user` （SQL），这样就实现了你的要求，希望对你有用。<?phpservername = "localhost";username = "username";password = "password";dbname = "myDB";// 创建连接conn = new mysqli($servern...
$sql = "CREATE TABLE If Not Exists imgs ( imgUrl VARCHAR(200) NOT NULL, reg_date TIMESTAMP )";if (mysqli_query($conn, $sql)) { echo "数据表 imgs 创建成功" . "<br>"; $sql = "INSERT INTO imgs (imgUrl) VALUES ('" . $_POST["img"] . "')";if...
mysql>createtable tb2like book; Query OK, 0rows affected (0.10 sec) 存在同名表时: mysql>createtable tb1(idint(10),tint(3)); ERROR 1050 (42S01):Table'tb1' already exists mysql>createtable ifnot exists tb1(idint(10),tint(3)); Query OK, 0rows affected, 1 warning (0.00 sec) mys...
CREATE DATABASE IF NOT EXISTS course_schedule; USE course_schedule; CREATE TABLE IF NOT EXISTS courses ( id INT AUTO_INCREMENT PRIMARY KEY, name VARCHAR(255) NOT NULL, teacher VARCHAR(255) NOT NULL, classroom VARCHAR(255) NOT NULL, start_time TIME NOT NULL, end_time TIME NOT NULL ); ...
Category:MySQL Server: Row Based Replication ( RBR )Severity:S2 (Serious) Version:5.1OS: Assigned to:Andrei ElkinCPU Architecture:Any [5 Sep 2006 17:47] Dean Ellis Description:CREATE TABLE IF NOT EXISTS SELECT ... statements truncate the "IF NOT EXISTS" clause when using row-based binlogs...
下面是一个使用mysqli扩展将留言保存到数据库的示例代码: “`php connect_error) { die(“连接数据库失败: ” . $conn->connect_error); } // 创建留言表 $sql = “CREATE TABLE IF NOT EXISTS messages ( id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY, ...
CREATE TABLE IF NOT EXISTS t2 AS SELECT f1,f2,f3 FROM (SELECT * FROM t2) AS A; SELECT * FROM t2; Result on mysql-next-bugfixing 2009-09-16 09:01:28 --- CREATE TABLE t1 (f3 INT, f1 INTEGER, f2 INT, PRIMARY KEY (f1)) ENGINE = MyISAM; INSERT INTO t1 VALUES (NULL, 1,...
MySQLi和PDO的主要区别在于: PDO支持客户端prepared语句,而mysqli不支持。我们将在后面的章节中详细讨论客户端prepared语句。这意味着如果所选的数据库服务器不支持MySQLi,数据库将模拟prepared语句。 MySQL支持面向对象API和过程API,而PDO则使用面向对象API。
3、在mysql创建thinkphp数据库,然后建表并插入数据,用wamp内置的phpmyadmin运行sql: CREATETABLEIFNOTEXISTS`think_data` ( `id`int(8) unsignedNOTNULLAUTO_INCREMENT, `data`varchar(255)NOTNULL,PRIMARYKEY(`id`) ) ENGINE=MyISAMDEFAULTCHARSET=utf8 ;INSERTINTO`think_data` (`id`, `data`)VALUES(1,'th...
1.创建mysql数据表 代码如下: --- 表的结构 `po_log`--CREATE TABLE IF NOT EXISTS `po_log` (`log_id` int(11) NOT NULL,`user_name` varchar(64) DEFAULT NULL,`logs` varchar(255) DEFAULT NULL,`equipment` varchar(50) DEFAULT NULL,`log_time` int(11) DEFAULT NULL,`log_ip` varchar(255...