To select the data that matches the specified criteria, add the WHERE clause to the SELECT statement.
WHERE clauseTo select the data that matches the specified criteria, add the WHERE clause to the SELECT statement.
Syntax SELECT column FROM table WHERE column operator valueThe following operators can be used with the WHERE clause:
Operator Description = equal! = Not equal> greater than <less than> = greater than or equal to <= less than or equal to BETWEEN LIKE search within a range inclusiveNote: SQL statements are case insensitive. WHERE and where equivalent.
In order for PHP to execute the above statement, we must use the mysql_query () function. This function is used to send queries and commands to SQL connections.
exampleThe following example selects all the rows of FirstName = 'Peter' from the "Person" table:
<? php $ con = mysql_connect ("localhost", "peter", "abc123"); if ($ con) {die ('Could not connect:'. mysql_error ());} mysql_select_db ("my_db", $ ; $ result = mysql_query ("SELECT * FROM person WHERE FirstName = 'Peter'"); while ($ row = mysql_fetch_array ($ result)) {echo $ row ['FirstName']. "". $ row [ LastName ']; echo "<br />";}?>Output of the above code:
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