How is the use of decimals in Oracle?
In Oracle, DECIMAL is a numeric data type used to store numbers with fixed precision and scale.
The DECIMAL data type is defined by two parameters: precision and scale. Precision refers to the total number of digits, including both decimal and integer digits. Scale refers to the number of digits after the decimal point.
Here is an example of using the DECIMAL data type in Oracle:
- Specify the DECIMAL type when creating a table.
Create a table called “my_table” with columns “id” as a NUMBER type and “amount” as a DECIMAL with precision 10 and scale 2.
In the example above, the type of the amount column is defined as DECIMAL(10, 2), indicating that it can store up to 10 digits, with 2 of them being decimal places.
- Insert a DECIMAL value in the INSERT statement.
Add a new record to my_table with an id of 1 and an amount of 100.50.
In the example above, insert the number 100.50 into the amount column.
- Using a DECIMAL column in a SELECT statement:
Retrieve the id and amount columns from my_table.
In the example above, select the values of the id and amount columns.
In conclusion, DECIMAL is a data type used in Oracle for storing numbers with fixed precision and decimal places. By specifying precision and decimal places, you can define the number of digits and decimal places for the number.
