The SQLite ABS function is used to return the absolute value of a numeric expression. In other words, it returns the positive value of a number, regardless of whether it was originally positive or negative.
The syntax for the ABS function in SQLite is as follows:
Where numeric_expression is the expression whose absolute value is to be returned.
Here are a few examples to illustrate how the ABS function works:
SELECT ABS(-5); Result: 5
In this example, the ABS function is used to return the absolute value of -5, which is 5.
SELECT ABS(10); Result: 10
In this example, the ABS function is used to return the absolute value of 10, which is also 10, since 10 is already a positive number.
SELECT ABS(NULL); Result: NULL
If the input to the ABS function is NULL, then the result will also be NULL.
In conclusion, the SQLite ABS function is a simple but useful function that allows you to quickly and easily return the absolute value of a numeric expression. It can be especially useful when dealing with calculations that involve both positive and negative numbers, and can help ensure that your results are accurate and consistent.