How-to articles, tricks, and solutions about SQL
The $this->db->get() function in CodeIgniter is used to retrieve data from a database table.
The "Commands out of sync; you can't run this command now" error in PHP usually occurs when you have called a MySQL function in an incorrect order.
In SQL Server, you can convert a varchar value to an integer or decimal value using the CAST or CONVERT function.
If you are trying to execute a query using Hibernate and are getting an error saying "could not extract ResultSet," it could be due to a few different issues:
Here is an example of how you could display an array in a readable/hierarchical format in PHP:
To update an entry in a database using Doctrine's query builder, you can use the update method of the QueryBuilder class.
To get data posted between two dates in PHP, you can use a SQL query with a WHERE clause and the BETWEEN operator.
To show the real SQL generated by Hibernate, you can enable the show_sql property in the Hibernate configuration file (hibernate.cfg.xml).
There are several ways to prevent SQL injection attacks in PHP.
To convert a java.util.Date object to a java.sql.Date object in Java, you can use the java.sql.Date constructor that takes a long value as an argument.
If you want to grasp the way of getting a query builder to output its raw SQL query as a string using PHP, then you are in the right place.
To include a PHP variable inside a MySQL statement, you need to use prepared statements with bound parameters.
If you want to learn how to prevent SQL injection in PHP, as well as to get comprehensive information about SQL injections, you are in the right place.
To print a Hibernate query string with parameter values, you can use the toString() method of the Query interface.
To set up a PDO connection, you will need to do the following:
When retrieving results in PHP and encountering ambiguous column names, you can use table aliases to specify which table the column belongs to.
In Laravel 5.1, you can use the selectRaw method to select the year and month from the created_at attribute of a database table.
You can use the DATE() and TIME() functions to extract the date and time parts of a DATETIME value in MySQL.
You can use the implode() function to convert the PHP array into a string of comma-separated values, and then use that string in the SQL query with the IN operator.
To increment a value in a MySQL update query using PHP, you can use the += operator.
To get a single value from a MySQL query in Laravel, you can use the value method on a query builder instance.
To insert data into a database using PDO and prepared statements, you can use the following steps:
The password for accessing phpMyAdmin and the password for connecting to the MySQL server using the mysql_connect() function can be different.
To select unique values from a column in PHP, you can use the array_unique function.