How to store decimal in MySQL?

Question

I\'ve tried using DECIMAL with (2,2) but it won\'t let me use this.

I simply want to store a number, for example 7.50 or 10.50. I need to keep both numbers after th

Answer 1

The first digit of the DECIMAL declaration is the total digits. You probably want to use DECIMAL (4, 2). This allows for up to two digits before the decimal and two after.

Documentation: https://dev.mysql.com/doc/refman/5.7/en/precision-math-decimal-characteristics.html

Answer 2

The syntax is DECIMAL(M,D)

M - total length

D - digits right of the decimal point

http://dev.mysql.com/doc/refman/5.6/en/fixed-point-types.html

The declaration syntax for a DECIMAL column is DECIMAL(M,D). The ranges of values for the arguments in MySQL 5.6 are as follows:

M is the maximum number of digits (the precision). It has a range of 1 to 65. (Older versions of MySQL permitted a range of 1 to 254.)

D is the number of digits to the right of the decimal point (the scale). It has a range of 0 to 30 and must be no larger than M.

Answer 3

CREATE TABLE `salary` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`salary` DECIMAL(10,2) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;

DECIMAL(10,2) indicates that salary will hold a total of 10 digits out of which 2 will be after the decimal.

i.e.

8 digits before decimal and 2 digits after decimal.

Answer 4

CREATE TABLE IF NOT EXISTS `table_name` (`id` int(11) NOT NULL AUTO_INCREMENT,`cost` DECIMAL( 10, 2 ) NOT NULL);

This will make the cost column hold a total of 10 digits, 8 before and 2 after the decimal point.

Answer 5

From mysql doc:

The declaration syntax for a DECIMAL column is DECIMAL(M,D). The ranges of values for the arguments are as follows:

• M is the maximum number of digits (the precision). It has a range of 1 to 65.
• D is the number of digits to the right of the decimal point (the scale). It has a range of 0 to 30 and must be no larger than M.

NB:- M is total no. of digits before decimal point + total no. of digits after decimal point.

In your case, 7.50 has a total no of 3 digits and 10.50 has a total no of 4 digits. But the declared maximum no. of digits for the column is 2 so it can store a maximum of two digits value. You cannot even store 1 because it's 1.00 i.e. total 3 digits. So the maximum allowed 2 digit value in the column is .99.

If you want to store xx.xx then you have to declare (4, 2) where 4 is M and 2 is D.

If you want to store any number at maximum allowed size of mysql then you can declare a column with (65, 30).

Maximum no. of digits before decimal point = M - D

Answer 6

Change your field from INT to FLOAT