The SQL FLOOR() rounded up any positive or negative decimal value down to the next least integer value. SQL DISTINCT along with the SQL FLOOR() function is used to retrieve only unique value after rounded down to the next least integer value depending on the column specified.
MySQL, PostgreSQL, SQL Server and Oracle
All of above platforms support the SQL syntax of FLOOR().
|expression||An expression which is a numeric value or numeric data type. Bit data type is not allowed.|
Pictorial presentation of FLOOR() Function
Application of FLOOR()
In the subsequent pages we have discussed how to apply FLOOR() with various SQL clauses. For those applications, we have used Oracle 10g Express Edition.
To get the rounded down to next integer value of 17.36 from the DUAL table, the following sql statement can be used :
SELECT FLOOR(17.36) FROM dual;
SQL floor() function on negative value
To get the rounded down to next integer value of -17.36 from the DUAL table, the following sql statement can be used :
SELECT FLOOR(-17.36) FROM dual;
Sql floor() function with distinct
To get the rounded down to next integer value of column 'commission' after multiplying by (-50) from the 'agents' table, the following sql statement can be used :
SELECT DISTINCT(FLOOR(commission*(-50))) "DISTINCT(FLOOR())", commission*(-50) FROM agents;
Outputs of the said SQL statement shown here is taken by using Oracle Database 10g Express Edition.
SQL Arithmetic Functions
Here is a new document which is a collection of questions with short and simple answers, useful for learning SQL as well as for interviews.