Age– It is an integer field used to define the age of an employee. Name– It is a variable-length string used to define the name of an employee. empID- It is an integer field used to uniquely define an employee record. We can also control the type of data and also a range of data to be accepted by the table, by assigning properties to the table and the columns within the table. And the number of rows in a standard user-defined database is only restricted to the storage capacity of the machine whereas the number of columns is limited to 1024. The number of tables in a SQL Server database is only limited to the number of objects allowed in a particular database instance which is 2,147,483,647. Let’s take an example of a student table created and maintained by a school, Here rows can represent each student record, and columns represent student data such as Name, Age, Standard, etc. The SQL server tables can also be defined as a collection of rows and columns, where each row represents a unique record and each column represents a field in the record. 
Tables stores data in a logically organized row-column format much similar to how we store data in a spreadsheet. A Table in SQL Server is defined as a database object which is used to store data in a database.
How to create a table in SQL Server from Excel What is a Table in SQL Server 2019
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