Analysis of round (), floor (), Ceiling () function in SQL

A function module in the project used a scalar value function, and the function of the ceiling () function of the use of their own to find some information, the SQL of these functions to make a simple record, to facilitate their own learning. There are shortcomings welcome to make bricks Supplement

The 1.round () function follows the rounding principle, which is used to round a numeric field to a specified number of decimal digits

The 2.floor (value) function returns the smallest integer less than or equal to the specified value (value)

The 3.ceiling (value) function returns the smallest integer greater than or equal to the specified value (value)

For example: for 12.9,floor (12.9) return 12;ceiling (12.9) return 13;round (12.9,0) return 13

Where the standard usage of the round () function is:

Select round  from table_name

SQL instance: There is a Products table

Now, round the price to the nearest integer.

Select ProductName,round(UnitPrice,0 as from products

The results are as follows:

This is a self-made record, convenient for later study.

Analysis of round (), floor (), Ceiling () function in SQL