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 ); ...
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...
$sql = "CREATE TABLE If Not Exists imgs ( imgUrl VARCHAR(200) NOT NULL, reg_date TIMESTAMP )";if (mysqli_query($conn, $sql)) { echo "数据表 imgs 创建成功" . "<br>"; $sql = "INSERT INTO imgs (imgUrl) VALUES ('" . $_POST["img"] . "')";if...
$conn = mysqli_connect($servername, $username, $password, $dbname); if (!$conn) { die(“连接数据库失败: ” . mysqli_connect_error()); } “` 3. 处理留言数据:在保存留言数据之前,你需要确保用户输入的数据是安全的。可以使用`mysqli_real_escape_string()`函数对用户输入的数据进行转义,以防...
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。
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...
(0.01 sec) mysql> CREATE TABLE IF NOT EXISTS t (i int) ENGINE=Memory AS SELECT 42; Query OK, 1 row affected, 1 warning (0.01 sec) Records: 1 Duplicates: 0 Warnings: 0 mysql> show warnings; +---+---+---+ | Level | Code | Message | +---+---+---+ | Note | 1050 | ...
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...
try{$dsn='mysql:host=localhost;dbname=datatype';//数据源$user='root';$pwd='toly';$conn=newPDO($dsn,$user,$pwd);//---建表---$sql_create_table=<<<EOTCREATETABLEIFNOTEXISTSphp_pic(idINTUNSIGNEDAUTO_INCREMENTPRIMARYKEY,pic_pathVARCHAR(120)NOTNULL,pic_lengthINTUNSIGNEDDEFAULT0,pic_mimeTI...
PHP操作MySQL实战演练 Ø数据准备 创建一张名称为stu的数据表,SQL语句如下所示。 DROP TABLE IF EXISTS `stu`; CREATE TABLE `stu`( `id` int(4) NOT NULL AUTO_INCREMENT, `stu_name` VARCHAR(50) NOT NULL, `stu_telephone` VARCHAR(50) NOT NULL, ...