連接資料庫
-
連接伺服器
mysql_connect("主機名稱","帳號","密碼"） -
選擇欲讀取的資料庫名稱
mysql_select_db("資料庫名稱") -
SQL 語法
mysql_query("SQL 語法") -
將資料設為 utf8 格式（才能讀取中文）
mysql_query("set names utf8") -
關閉連結
mysql_close(mysql_connect("主機名稱","帳號","密碼"）)
<?php
$server='localhost';
$id='root';
$pwd='1234';
$dbname='mes_board';
$con = mysql_connect($server , $id , $pwd);
if (!$con){
die("Could not connect: " . mysql_error());
}
mysql_select_db($dbname , $con);
mysql_query("SET NAMES utf8");
// mysql_close($con);
?>
MySQL 語法
<?php
$sql = "select * from 資料庫名稱";
$result = mysql_query($sql);
?>
先用一個變數 sql 把 MYSQL 的語法存下來，再塞到 mysql_query()裡面
<?php
$num = mysql_num_rows($result);
$data = mysql_fecth_rows($result);
?>
mysql_num_rows()：回傳我們的資料有幾個列 mysql_fecth_rows()：讀取該資料表中列的資料，回傳的是一列資料。 一般會搭配迴圈
<?php
$sql = "SELECT * FROM DB_TABLE";
$result = mysql_query($sql);
$demo = array();
$k=0;
while($data = mysql_fetch_array($result)){
$demo[$k] = $data;
$k++;
}
?>
創造 create
CREATE TABLE table_name(
column_name1 data_type,
column_name2 data_type,
column_name3 data_type,
.......
)
插入 insert
INSERT INTO table_name VALUES (value1, value2,....)
INSERT INTO table_name (column1, column2,...) VALUES (value1, value2,....)
查詢 select
SELECT * FROM table_name
從某資料庫中讀取所有的（*）資料表
SELECT column_name(s) FROM table_name
where
SELECT column FROM table
WHERE column operator value
order by
SELECT column_name(s)
FROM table_name
ORDER BY column_name
預設是升序
SELECT column_name(s)
FROM table_name
ORDER BY column_name DESC
DESC 降序
更新 update
UPDATE table_name
SET column_name = new_value
WHERE column_name = some_value
刪除 delete
DELETE FROM table_name
WHERE column_name = some_value