What is NULL ? As the name suggests, Null value represents a field with Zero/Blank Value. It is very important to learn that NULL value do not represent ‘0’ or any spaces. NULL values are different from Zero . In SQL , A field that is left blank is considered to be a NULL value. SQL …
What is Data type? Like any other programming language, SQl commands are distributed among various functions. Data types describes the nature of a data which tells the compiler or interpreter to use the data in its various forms. In context to SQL Data types , A data type defines the type of value stored in …
SQL (Structure query language) is mainly termed as a domain-specific language. A domain specific language is a specialized computer language used for a particular domain. rdbms concepts are very important to get our basics and vision clear. RDBMS uses SQL language for stream processing. SQL is a set based, and a decorative programming language, and …
A wildcard character is used to replace any character(s) in a string. Wildcard operator are used with SQL Like operator . The link to SQL WHERE Clause in mentioned in the article. Like operator are used with SQL WHERE CLAUSE to search for a particular pattern mentioned in the table/column. SQL Wildcard operators—> [SQL Like …
A database is a systematic collection of data. Database systems are used to store, access, delete data. furthermore, it also systematically organize data in a database.This article briefly discuss about the use and importance of SELECT Query in SQL. Consider a cafeteria, which provides snacks and other eatable item to its customers. Traditionally, the snacks, …