MySQL BigInt

use educba;

that will give the following output –

Further, we will create the table named subjects that will contain subject_id as the primary key column of BIGINT datatype and one more unsigned BIGINT column named pages wing the following query –

CREATE TABLE subjects (
subject_id BIGINT AUTO_INCREMENT PRIMARY KEY,
description VARCHAR(255),
pages BIGINT UNSIGNED
that gives the following output –
For an auto_increment column, if a null or zero value is inserted, the sequence automatically increments the value by 1 from the last maximum value. The initial value inserted is 1. However, if a non-null and non-zero value is provided, it is accepted and used as the inserted value. The sequence value is then set as that inserted value plus 1 for subsequent inserts.
Let us insert some values in the table subjects using the following query –
INSERT INTO
subjects(description,pages)
VALUES
('MySQL',13600),
('Angular',20000),
('Java',96560);
that gives the following output –
Let us check the inserted records by firing the command –
select * from subjects;
that provides the following output –
We can see that the subject_id column has got the default autoincremented values as 1,2, and 3. Let us insert one record mentioning the subject_id column value as follows –
INSERT INTO
subjects(subject_id,description,pages)
VALUES
(9223372036854775806,'Maven',156);
that gives the following output –
Let us check the records of the subjects table by using the same select query that gives the following output –
select * from subjects;
Upon inserting the value 9223372036854775806 into the subject_id column, the sequence automatically adjusts to set 9223372036854775807 as the next value. As a result, if we insert a record without specifying a subject_id value, it will default to 9223372036854775807 as the next value in the sequence, following the insertion of columns with subject_id values of 9223372036854775806. Executing the following command –
INSERT INTO
subjects(description,pages)
VALUES
('Hibernate',99);
gives the following output –
And after selecting the records of the table, it shows the following content –
select * from subjects;
After inserting the record in the subjects table without subject_id specification, such as the next –
INSERT INTO subjects(description,pages) VALUES ('javascipt',105);
gives the error saying the 9223372036854775807 ids are duplicated because the range f the BIGINT datatype of signed type by default exceeds, and the output is as follows –
Let us see what happens if we specify the value of the pages column of unsigned BIGINT type greater than 9223372036854775807, say 10223372036854775807 using the following insert query –
INSERT INTO
subjects(subject_id,description,pages)
VALUES
(4,'Typescript',10223372036854775807);
that gives the following output –
and works completely fine because the range of unsigned BIGINT is 255 while of signed is 127.
After selecting the records, we see the following output –
select * from subjects;
Display width and ZEROFILL attribute –
MySQL allows the specification of display width for a column by including the desired width within () brackets after the data type. It’s essential to understand that this display width pertains to the formatting of values, not the storage size. Using the ZEROFILL attribute results in filling any empty spaces within the specified display width with zeroes when displaying the number. For example, if we alter the pages column of the subjects table to the ZEROFILL attribute and specify the display width as 20 using the following command –
ALTER TABLE subjects MODIFY COLUMN pages BIGINT(20) ZEROFILL;
that gives the following output –
Assigning the ZEROFILL property to a column automatically designates it as an unsigned column. Let us now select the records of the subject table and observe the pages column values display format that should be 20-digit format with blank spaces replaced with 0.
The select query gives the following output –
select * from subjects;
Conclusion
The BIGINT data type finds its frequent application in storing extremely large integral values. It offers the flexibility to assign attributes such as AUTO_INCREMENT and ZEROFILL. Additionally, the display width of a BIGINT column can be specified using () brackets.
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