Recommended articles about the mysql_select_db() function

How to operate MySQL database with PHP - how to select a database file. In our daily PHP development work, when we want to obtain data from the database, after PHP connects to the database, the next step is to select the database file. A function is used, the mysql_select_db() function selects the database! Before choosing a database, the first thing we do is connect PHP to the database. We have detailed how to establish a connection in the previous article "Using the mysql_connect() function to connect to the database (Method 1 of PHP operating MySQL database)". I won’t introduce much here. Today we will mainly talk about the mysql_select_db() function! The syntax format of the mysql_select_db() function is as follows: mysql_select_db(string database name[,resource link_identifier]) or: mysql_query("use database name"[,resource&

1. About mysql_select_db() Recommended 10 articles

## Introduction: How to operate MySQL database with PHP - How to select the database file in our In daily PHP development work, when we want to obtain data from the database, after PHP connects to the database, the next step is to select the database file, and we need to use a function, the mysql_select_db() function to select the database! , the first thing we do is to connect PHP to the database, which we discussed in the previous article "Using the mysql_connect() function to connect to the database (PHP method for operating MySQL database...

2 . Detailed introduction to selecting database files

##Introduction: How to operate MySQL database with PHP - How to select a database file In our daily PHP development work, when we want to obtain data from the database, after PHP connects to the database, the next step is to select the database file, and we need to use a function, mysql_select_db() function selection Database! Before choosing a database, the first thing we do is to connect PHP to the database. We discussed this in the previous article "Using the mysql_connect() function to connect to the database (How PHP operates the MySQL database...

3.

Use the mysql_select_db() function to select the database file (method 2 of PHP operating MySQL database)

Introduction: In our daily PHP development work, when we want to obtain data from the database, after PHP connects to the database, the next step is to select the database file, and we need to use a function. The mysql_select_db() function selects the database!

##4.

The difference between mysql_db_query and mysql_query

Introduction: I won’t talk about the difference. Yes, you will know after reading the above example. The main difference is that there is one more mysql_select_db. Regarding performance, the use of this function is not recommended since PHP 4.0.6. Do not use this function. Use mysql_select_db() and mysql_query() instead.

5.

CAPI function description (S-W)

Introduction: 25.2.3.59. mysql_select_db() int mysql_select_db( MYSQL *mysql, const char *db) Description Makes the database specified by db the default database (current database) on the connection specified by mysql. In subsequent queries, this database will be the default database referenced by tables that do not contain an explicit database separator. Unless you are connected, use

6.

PHP Self-study Tutorial for MySQL Database

Introduction: PHP access to MySQL database General steps: 1. Connect to MySQL database: Use the mysql_connect() function to establish a connection with the MySQL server. 2. Select the MySQL database: Use the mysql_select_db() function to select the database on the MySQL database server. 3. Execute the SQL statement: use the mysql_query() function in the selected database

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