SQLite provides a built-in function called SQRT, which is used to calculate the square root of a given number. The SQRT function takes a single argument, which can be a numeric value or an expression that evaluates to a numeric value.


The syntax for using the SQRT function is as follows:


Here, X is the value for which we want to calculate the square root. The result of the SQRT function is the square root of X.


For example, to calculate the square root of 9 using the SQRT function in SQLite, we can write the following query:


This will return the result 3, which is the square root of 9.

In addition to the SQRT function, SQLite also provides other mathematical functions such as ABS, ACOS, ASIN, ATAN, ATAN2, CEIL, COS, EXP, FLOOR, LOG, LOG10, MAX, MIN, POW, RANDOM, ROUND, SIGN, SIN, TAN, and TRUNC. These functions can be used to perform a wide range of mathematical calculations in SQLite.

It is important to note that the SQRT function returns a NULL value if the input argument is a negative number. Therefore, it is important to handle such cases appropriately in your application code.