Here is the list of all important MySQL functions. Each function has been explained along with suitable example.

• MySQL Group By Clause - The MySQL GROUP BY statement is used along with the SQL aggregate functions like SUM to provide means of grouping the result dataset by certain database table column(s).
• MySQL IN Clause - This is a clause, which can be used along with any MySQL query to specify a condition.
• MySQL BETWEEN Clause - This is a clause, which can be used along with any MySQL query to specify a condition.
• MySQL UNION Keyword - Use a UNION operation to combine multiple result sets into one.
• MySQL COUNT Function - The MySQL COUNT aggregate function is used to count the number of rows in a database table.
• MySQL MAX Function - The MySQL MAX aggregate function allows us to select the highest (maximum) value for a certain column.
• MySQL MIN Function - The MySQL MIN aggregate function allows us to select the lowest (minimum) value for a certain column.
• MySQL AVG Function - The MySQL AVG aggregate function selects the average value for certain table column.
• MySQL SUM Function - The MySQL SUM aggregate function allows selecting the total for a numeric column.
• MySQL SQRT Functions - This is used to generate a square root of a given number.
• MySQL RAND Function - This is used to generate a random number using MySQL command.
• MySQL CONCAT Function - This is used to concatenate any string inside any MySQL command.
• MySQL DATE and Time Functions - Complete list of MySQL Date and Time related functions.
• MySQL Numeric Functions - Complete list of MySQL functions required to manipulate numbers in MySQL.
• MySQL String Functions - Complete list of MySQL functions required to manipulate strings in MySQL.