What is the identity column?
Identity column is used in database management to add a generated value to the column in the database table. If the database administrator does not plan to identify the key because the identity column is not unique by its essence, it can cause redundant information. Two numbers are required to create an identity field; One is for the seed or the primary number and the other is the addition that performs with each new information in the column. Using this column in a database where information is often deleted can cause data gaps. As a result, the database column is like a column in a table where each cell has its own identity. The primary use of the identity function is to give the column a unique number so the administrator can easily find and call it.
Although the identity column is assumed to help create the unique database section, do not do it by its essence. The administrator can assign the same identity numbers to two separate columns and the database will not return any errors. Usually the showerI only if he calls one table and gets a few in return. To alleviate this, it is best for the administrators not to lead notes about what numbers are already used.
The identity function requires both the seed and the increment and specifies the first cell in the column. The seed is the first number and acts as a primary identification aspect of the entire column and the increment is the exact number of the cell in the column. The database manager can set identity columns in a function or database can automatically assign a value to the column. For example, if the administrator sets a column as 3.5, then 3 is seed and 5 is increment and increases with each new cell. This is because the identity function specifies only the first cell and takes over the database.
When combined with a database that has often removed data, the identity column can experience some problems. When the data is deleted, the column automatically assigns the numbers so the columnsC can jump from 3.5 to 3.8 without other cells. This in itself usually does not cause problems, but it can make it difficult to organize identity data.