MySQL – Find Duplicate Records Table of content Duplicate records in a table decrease the efficiency of a MySQL database (by increasing the execution time, using unnecessary space, etc.). Thus, locating duplicates becomes necessary to efficiently use the database. We can, however, also prevent users from entering duplicate values into a table, by adding constraints […]
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MySQL – Delete Duplicate Records Table of content The MySQL Delete Duplicate Records Duplicate records in a database, including MySQL, is a very common occurrence. A MySQL database stores data in the form of tables consisting of rows and columns. Now, a record is said to be duplicated when two or more rows in a […]
MySQL – Select Random Records Table of content Have you ever taken online examinations? If yes, then did you ever wonder how is the order, in which these questions are displayed, random? These questions are usually stored in a database of the test application and are randomly displayed one by one. While using a database […]