PHP date()格式MySQL中插入datetime方法

2024-05-05 00:06:26

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當使用PHP在MySQL中編寫查詢時，它的適用性將基于MySQL本身進行檢查。所以使用MySQL提供的默認日期和時間格式，即'YYYY-MM-DD'

例子：

ATE: YYYY-MM-DDExample: 2019-01-28 DATETIME: YYYY-MM-DD HH:MI:SSExample: 2019-01-28 23:50:30 TIMESTAMP: YYYY-MM-DD HH:MI:SSExample: 2019-01-28 23:50:30 YEAR: YYYY or YY

用于創(chuàng)建DataBase的MySQL查詢：

CREATE DATABASE Date_time_example;

示例1：用于創(chuàng)建數(shù)據(jù)庫和表的PHP程序

<?php   $servername = "localhost"; $username = "root"; $password = ""; $dbname = "test";   // 創(chuàng)建連接$conn = mysqli_connect( $servername, $username, $password, $dbname );   // 檢查連接 if ( !$conn ) {   die("Connection failed: " . mysqli_connect_error()); }   // 創(chuàng)建表的SQL查詢 $sql = "CREATE TABLE date_test (   id INT AUTO_INCREMENT PRIMARY KEY,   created_at DATETIME )";   if (mysqli_query($conn, $sql)) {   echo "Table date_test created successfully"; } else {   echo "Error creating table: " . mysqli_error($conn); }   // 關閉連接mysqli_close($conn);

輸出：

Table date_test created successfully

示例2：將日期插入表中的PHP程序。

<?php   $servername = "localhost"; $username = "root"; $password = ""; $dbname = "test";   // 創(chuàng)建連接 $conn = mysqli_connect( $servername, $username, $password, $dbname );   // 檢查連接if ( !$conn ) {   die("Connection failed: " . mysqli_connect_error()); }   // 用于向表中插入數(shù)據(jù)的SQL查詢 $sql = "INSERT INTO date_test( created_at )     VALUES( '2019-01-28 12:39:16' );";   if (mysqli_query($conn, $sql)) {   echo "New record created successfully"; } else {   echo "Error: " . $sql . "<br>" . mysqli_error($conn); }   // 關閉連接mysqli_close($conn);

輸出：

New record created successfully

示例3：此示例用于顯示在2019-01-28上創(chuàng)建的行。使用以下查詢顯示結果。created_at列不僅包含日期，還包含時間。所以它會顯示錯誤信息。

SELECT * FROM date_test WHERE DATE( created_at ) = '2019-01-28';

<?php   $servername = "localhost"; $username = "root"; $password = ""; $dbname = "test";   //創(chuàng)建連接 $conn = mysqli_connect( $servername, $username, $password, $dbname );   // 檢查連接if ( !$conn ) {   die("Connection failed: " . mysqli_connect_error()); }   //SQL查詢 $sql = "SELECT * FROM date_test WHERE DATE(created_at) = '2019-01-28'";   $result = mysqli_query( $conn, $sql );   if ($result) {   echo $result; //打印查詢結果 } else {   echo "Error: " . $sql . "<br>" . mysqli_error($conn); }   // 關閉連接mysqli_close($conn);

輸出：