Which command is used to structure the table?

Which command is used to show the structure of a table?

So desc or describe command shows the structure of table which include name of the column, data-type of column and the nullability which means, that column can contain null values or not.

Which command used to change the structure of the table?

The SQL ALTER TABLE command is used to change the structure of an existing table.

How do you find the structure of a table?

To show table properties in the Properties window1In Object Explorer, select the table for which you want to show properties.2Right-click the table and choose Properties from the shortcut menu. For more information, see Table Properties - SSMS.View the Table Definition - SQL Server | Microsoft Docs