such as creating tables, inserting data, querying information, and controlling access and security. SQL commands can be categorized into different types, each serving a specific purpose in the database management process.
3 types of Commands DDL DML DCL DDL CREATE ALTER DROP Date and Time Dates: 'YYYY MM DD' e.g. '1975 05 17' Times: ‘hh:mm:ss[.f] ' e.g. '15:00:00' Timestamp: ‘YYYY MM DD hh:mm:ss[.f] ' e.g. ‘1975 05 17 15:00:00' To add date DATE_ADD(date, INTERVAL expr ...
Learn more:SQL Commands Operators (IN, EXISTS) There are several keywords that let you filter your data in other ways, such as IN and EXISTS. Learn more:SQL Operators Subqueries A subquery is a query inside another query. They can help you solve problems that can’t otherwise be solved in...
IF EXISTS is one of the parameters, we can use it while removing the database in the SQL Server. Suppose there are several databases in the SQL Server, and we don't know whether the database is removing resides in the SQL Server. The purpose of the IF EXISTS parameter is to check wh...