SQL Constraints: SQL Constraints are the set of rules followed by SQL programming language. SQL is a procedural programming language.They are used to specify rules for the data. They put a condition , and limit to data entering the table. SQL Constraints could be divided into ‘2’ levels: Constraints could be of ‘Table level’ or …
SQL Check Constraint This article will help you to pratice and devlop your concept for SQL CHECK Constraint.SQL ‘CHECK’ constraint are used in creating a table , and altering a table. It is used to limit the range of values that can be placed in columns. ‘CHECK’ constraint provides us with a condition , if …
SQL AND,OR and NOT SQL provides us with logical operators that makes our work easy . SQL logical operator helps in filtering the result. The three most commonly used logical operator are – AND , OR, NOT. SQL logical operator are used with ‘WHERE’. Let us discuss about SQL AND,OR and NOT operators. SQL AND,OR and …
SQL IN operator This SQL tutorial explains how to use IN operator in SQL.SQL IN condition is also termed as SQL IN operator , It easily allow us to test if the expression fulfill the condition.The ‘IN’ operator belongs to the same family as of ‘OR’ operator.SQL ‘IN’ operator are treated as a shorthand for …
What are SQL Aggregation functions ? SQL Min and Max functions are also known as SQL aggregation functions. SQL is very good at aggregating data. One should know the aggregation functions in SQL. There are mainly 5 Types of Aggregation Functions in SQL: COUNT: counts the number of rows in a column. SUM :adds all the values …