$conn = new mysqli($servername, $username, $password, $dbname); // 检查连接是否成功 if ($conn->connect_error) { die(“连接失败: ” . $conn->connect_error); } “` 然后,编写SQL查询语句,并使用mysqli_query函数执行查询: “` $sql = “SELECT * FROM 表名 WHERE 标题=’要查询的标题'...
$conn->connect_error); }else{ echo '连接成功!'; } //创建数据库 $sql="create database myDB"; if($conn->query($sql) === TRUE){ echo '数据库创建成功'; }else{ echo '数据库创建失败:'.$conn->error; } $conn->close(); <?php $servername = "localhost"; $username = "username...
if (!$conn) { die(“连接数据库失败: ” . mysqli_connect_error()); } “` 2. 执行SQL查询: 可以使用`mysqli_query()`函数来执行SQL查询。该函数接受两个参数,第一个参数是连接对象,第二个参数是SQL查询语句。 “`php $query = “SELECT * FROM users”; // 示例查询语句 $result = mysqli_q...
$conn = new mysqli($servername, $username, $password, $dbname); $conn->query("set names utf8"); // Check connection if ($conn->connect_error) { die("连接失败: " . $conn->connect_error); } $sql = "SELECT cate_Name FROM zbp_category"; $result = $conn->query($sql); if (...
SQL (Structured Query Language) 是用来与 MySQL 数据库通信的语言。SQL 语法包括数据操作语句、数据定义语句和数据控制语句。以下是一些常见的 SQL 语句：a）SELECT 语句：Retrieve data from one or more tables.php $sql = "SELECT * FROM employees";$result = $conn->query($sql);b）INSERT 语句：Add ...
sqlsrv_query()函数可用于针对 SQL 数据库从查询中检索结果集。 此函数实质上接受任意查询和连接对象,并返回可使用sqlsrv_fetch_array()循环访问的结果集。 PHP functionReadData(){try{ $conn = OpenConnection(); $tsql ="SELECT [CompanyName] FROM SalesLT.Customer"; $getProducts = sqlsrv_query($con...
("连接失败: " . $conn->connect_error); } // 执行多条SQL语句 $sql = "SELECT * FROM table1; SELECT * FROM table2;"; if ($conn->multi_query($sql)) { // 获取结果 do { if ($result = $conn->store_result()) { // 处理结果 while ($row = $result->fetch_assoc()) { // ...
($serverName, $connectionOptions); $tsql= "SELECT TOP 20 pc.Name as CategoryName, p.name as ProductName FROM [SalesLT].[ProductCategory] pc JOIN [SalesLT].[Product] p ON pc.productcategoryid = p.productcategoryid"; $getResults= sqlsrv_query($conn, $tsql); echo ("Reading data ...
$stmt = sqlsrv_query($conn, $tsql);if($stmt ===false) {echo"Error in query execution";echo"";die(print_r(sqlsrv_errors(),true)); }while($row = sqlsrv_fetch_array($stmt, SQLSRV_FETCH_ASSOC)) {echo$row['Name'] .""; } sqlsrv_free...
因为代码不全，只能就已知代码说下原因，貌似是SQL语法错误：insert into user(email,password) valuse ('$email','$passwd') "应该是 insert into user(email,password) values ('$email','$passwd') "即 valuse 单词拼写错误，应该是 values 你...