SQL
SQL Aggregate Functions
What Are SQL Aggregate Functions? SQL aggregate functions perform calculations on a set of values and return a single value. These functions are comm…
MySQL
SQL CASE Statement
Understanding the SQL CASE Statement The SQL CASE statement is a powerful conditional expression that allows you to execute logic within an SQL que…
MySQL
SQL Alias
Understanding SQL ALIAS An SQL ALIAS is a temporary name assigned to a table or a column in a query. It improves readability and convenience, especi…
SQL
SQL INNER JOIN
Understanding SQL INNER JOIN The SQL INNER JOIN is a type of join that retrieves records from two or more tables based on a related column. It ret…
SQL
SQL LEFT JOIN
Understanding SQL LEFT JOIN The SQL LEFT JOIN (or LEFT OUTER JOIN ) retrieves all records from the left table (first table) and the matched records …
SQL
SQL FULL OUTER JOIN
Understanding SQL FULL OUTER JOIN The SQL FULL OUTER JOIN retrieves records from both the left and right tables. It returns all rows when there is a…
SQL
SQL IS NULL
Understanding SQL IS NULL In SQL, the IS NULL operator is used to check if a value in a column is NULL . A NULL value represents missing, undefined…
SQL
SQL NOT Operator
Understanding the SQL NOT Operator The SQL NOT operator is used to negate a condition in a query. It is a logical operator that returns TRUE if th…
SQL
SQL IN
What is the SQL IN Operator? The IN operator in SQL is used to filter rows based on whether a column value matches any value in a specified list. I…
SQL
SQL LIKE
What is the SQL LIKE Operator? The LIKE operator in SQL is used to search for a specified pattern in a column. It is commonly used in WHERE clause…
SQL
SQL Logical Operators
What are SQL Logical Operators? SQL Logical Operators are used to combine multiple conditions in a query WHERE or HAVING clause to refine the data …
SQL
SQL AND
What is the SQL AND Operator? The AND operator in SQL is a logical operator used in the WHERE or HAVING clause to combine two or more conditions.…
