Posts tagged with sql:

Difference between Fetch_assoc, Fetch_array, Fetch_row - MySQLWhat is the difference between Fetch_assoc, Fetch_array and Fetch_row in MySQL. When is it effective to use each of them ?

MySQL, MariaDB, SQLite, PostgreSQL, Oracle, MS SQL, DB2 - differenceWhat is the difference between MySQL, MariaDB, SQLite, PostgreSQL, Oracle, MS SQL and IBM DB2 ? Which one is better than the other ? Do they work with regular SQL language ?

SQL to calculate total balance amount of each owner - debit/creditHow should the SQL Select look like, if I need to get the total account balance for each customer, from debit and credit transactions ? Table looks like: Transaction ID,...

Error: Illegal parameter data types INT and row for operation '='I am trying to use SELECT in SELECT in SQL query, to count the matches, but I am getting SQL error: Illegal parameter data types INT and row for operation '=' What...

Fatal error: Call to undefined function mysql_query() - PHPOn my new hosting, when I try to get the data from MySQL database with SELECT statement, the following error notification appears: Fatal error: Uncaught Error: Call to...

Fix error: mysqli_select_db / query expects 2 arguments, 1 givenI have upgraded MySQL to a higher version, but I am getting an error: Fatal error: Uncaught ArgumentCountError: mysqli_select_db() expects exactly 2 arguments, 1 given How...

Is faster one big SQL query or multiple small SQL queries ?I need to optimize the SQL queries to make them faster. Is it better to run one big query or more small queries ?

Using Update and Left Join in SQL together not working - exampleI need to use UPDATE and LEFT JOIN functions together in SQL, but it is not working. I am receiving the error notification: You have an error in your SQL syntax; check the...

Error: User has exceeded the 'max_queries_per_hour' resourceSometimes I am getting an error notification: User has exceeded the 'max_queries_per_hour' resource (current value: 15000) I am using a PHP and MySQL database. How...

Copy and update rows in the same table with autoincrement - SQLI need to copy the specific range of rows into the same table with autoincrement and update them. How can I do it by using SQL INSERT INTO function, without creating of the...