The long data type in MySQL is used to store whole numbers that range from -9223372036854775808 to 9223372036854775807. It is an integer data type that can hold values with a length of 8 bytes.
Creating a Long Column
To create a column with the long data type, you can use the CREATE TABLE statement in MySQL:
CREATE TABLE my_table (
id LONG
);
In the above example, we created a table named “my_table” with a column named “id” of the long data type.
Inserting Values into a Long Column
To insert values into a long column, you can use the INSERT INTO statement:
INSERT INTO my_table (id)
VALUES (1234567890);
In this example, we inserted the value 1234567890 into the “id” column of the “my_table” table.
Retrieving Values from a Long Column
To retrieve values from a long column, you can use the SELECT statement:
SELECT id
FROM my_table;
This query will return all the values stored in the “id” column of the “my_table” table.
Working with Long Data Type in Queries
You can also use comparison operators such as =, >, <, >=, <=, and <> to perform operations on long columns:
SELECT id
FROM my_table
WHERE id > 1000;
This query will retrieve all the values from the “id” column of the “my_table” table where the value is greater than 1000.
Conclusion
The long data type in MySQL is useful for storing large whole numbers within the specified range. It provides a way to efficiently store and retrieve numeric values that require a larger storage size than other integer data types. By understanding how to create, insert, and query long columns, you can effectively work with this data type in your MySQL databases.
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Method 1: Using the DESCRIBE Statement
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DESCRIBE table_name;
Example:
DESCRIBE employees;
This will return a result set with columns such as Field, Type, Null, Key, and Default.
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