SQL – Transactions Table of content SQL Transactions A transaction is a unit or sequence of work that is performed on a database. Transactions are accomplished in a logical order, whether in a manual fashion by a user or automatically by some sort of a database program. A transaction is the propagation of one or […]

SQL – Stored Procedures Table of content SQL Stored Procedures An SQL stored procedure is a group of pre-compiled SQL statements (prepared SQL code) that can be reused by simply calling it whenever needed. It can be used to perform a wide range of database operations such as inserting, updating, or deleting data, generating reports, […]

SQL – NULL Values Table of content SQL uses the term NULL to represent a non-existent data value in the database. These values are not the same as an empty string or a zero. They don”t hold any space in the database and are used to signify the absence of a value or the unknown […]