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PHP MSSQL - Creating an Identity Column
PHP MSSQL - How To Create an Identity Column?
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Many tables require an ID column to assign a unique ID number for each row in the table. For example, if you have a table to hold forum member profiles, you need an ID number to identify each member. To allow SQL Server to automatically assign a new ID number for each new record, you can define the ID column with IDENTITY attribute as shown in the following sample script:
<?php $con = mssql_connect('LOCALHOST','sa','FYIcenter'); mssql_select_db('FyiCenterData', $con); $sql = "CREATE TABLE fyi_users (" . " id INTEGER IDENTITY NOT NULL" . ", name VARCHAR(80) NOT NULL" . ", email VARCHAR(80) NULL" . ", time DATETIME NULL" . ")"; $res = mssql_query($sql, $con); if (!$res) { print("Table creation failed with error:\n"); print(" ".mssql_get_last_message()."\n"); } else { print("Table fyi_users created.\n"); } mssql_close($con); ?>
If you run this script, a new table will be created with ID column defined as an identity column. It value will be auto-assigned each time a new record is inserted with an auto-incremented number. The sample script below inserts two records with ID values assigned by SQL Server:
<?php $con = mssql_connect('LOCALHOST','sa','FYIcenter'); mssql_select_db('FyiCenterData', $con); $sql = "INSERT INTO fyi_users (name)" . " VALUES ('John King')"; $res = mssql_query($sql, $con); $sql = "INSERT INTO fyi_users (name)" . " VALUES ('Nancy Greenberg')"; $res = mssql_query($sql, $con); $sql = "SELECT id, name, time FROM fyi_users"; $res = mssql_query($sql, $con); while ($row = mssql_fetch_array($res)) { print($row['id'].", ".$row['name'].", " . $row['time']."\n"); } mssql_free_result($res); mssql_close($con); ?>
If you run this script, you will get something like this:
1, John King, 2, Nancy Greenberg,
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2024-02-09, 1264🔥, 0💬
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