Select MySQL database from the command prompt window

Select... From the command prompt window MySQL database

stay mysql> In the prompt window, you can simply select a specific database . You can use SQL Command to select the specified database .

example

The following example selects the database RUNOOB:

[[email protected]]# mysql -u root -p
Enter password:******
mysql> use RUNOOB;
Database changed
mysql>

After executing the above order , You've already made the choice RUNOOB database , In subsequent operations, it will be in RUNOOB Execute... In the database .

Be careful : All database names , Table name , Table fields are case sensitive . So you're using SQL You need to enter the correct name for the command .

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Use PHP Script selection MySQL database

PHP Provides functions mysqli_select_db To select a database . Function returns after successful execution TRUE , Otherwise return to FALSE .

grammar

mysqli_select_db(connection,dbname);

Parameters	describe
connection	It's necessary . Stipulate what to use MySQL Connect .
dbname	It's necessary , Specify the default database to use .

example

The following example shows how to use mysqli_select_db Function to select a database ：

Select database

<?php
$dbhost = 'localhost';  // mysql Server host address 
$dbuser = 'root';            // mysql user name 
$dbpass = '123456';          // mysql User name, password 
$conn = mysqli_connect($dbhost, $dbuser, $dbpass);
if(! $conn )
{
    die(' The connection fails : ' . mysqli_error($conn));
}
echo ' Successful connection ';
mysqli_select_db($conn, 'RUNOOB' );
mysqli_close($conn);
?>