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How do I select a SQL database in PHP?

How do I select a SQL database in PHP?

Selecting a MySQL Database Using PHP Script PHP uses mysqli_select_db function to select the database on which queries are to be performed. This function takes two parameters and returns TRUE on success or FALSE on failure.

Is used to select database using PHP?

The select_db() / mysqli_select_db() function is used to change the default database for the connection.

How retrieve data from database of a particular user after login in PHP?

Retrieve or Fetch Data From Database in PHP

  1. SELECT column_name(s) FROM table_name.
  2. $query = mysql_query(“select * from tablename”, $connection);
  3. $connection = mysql_connect(“localhost”, “root”, “”);
  4. $db = mysql_select_db(“company”, $connection);
  5. $query = mysql_query(“select * from employee”, $connection);

How do I query a MySQL database?

Some of the commonly used MySQL queries, operators, and functions are as follows :

  1. SHOW DATABASES. This displays information of all the existing databases in the server.
  2. USE database_name. database_name : name of the database.
  3. DESCRIBE table_name.
  4. SHOW TABLES.
  5. SHOW CREATE TABLE table_name.
  6. SELECT NOW()
  7. SELECT 2 + 4;
  8. Comments.

How do you perform a select statement in MySQL?

The SELECT query in MySQL offers two options. The first one is to define which tables the command should refer to. You specify the column names after the FROM clause and separate them by commas. The second option is to use the JOIN clause.

How do you select data in a database?

An SQL SELECT statement retrieves records from a database table according to clauses (for example, FROM and WHERE ) that specify criteria. The syntax is: SELECT column1, column2 FROM table1, table2 WHERE column2=’value’;

How do I query a SQL database?

The article demonstrates how to follow the below steps:

  1. Connect to a SQL Server instance.
  2. Create a database.
  3. Create a table in your new database.
  4. Insert rows into your new table.
  5. Query the new table and view the results.
  6. Use the query window table to verify your connection properties.

How do I write a select query in SQL?

The MySQL SELECT Statement The SELECT statement is used to select data from a database. The data returned is stored in a result table, called the result-set.

How do I query a SQL Server database?

Execute a Query in SQL Server Management Studio

  1. Open Microsoft SQL Server Management Studio.
  2. Select [New Query] from the toolbar.
  3. Copy the ‘Example Query’ below, by clicking the [Copy Text] button.
  4. Select the database to run the query against, paste the ‘Example Query’ into the query window.