Constraints In SQL By Sagar Jaybhay

Sql Server By Sagar Jaybhay

Constraints In SQL Constraints are the rules which are enforced on columns of the table in database.  They specifically used to limit or restrict that data goes into a column. Constraints ensure the reliability and accuracy of data. We can apply constraints on column level or table level. In this column level constraints are applied on one column at a time but when you use table-level constraints these are applied on all columns of that table. Commonly used Column constraints are below Not Null Default Unique Primary Key Foreign key…

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About Tables In DataBase By Sagar Jaybhay

Sql Server By Sagar Jaybhay

About Tables By Sagar Jaybhay Tables are database objects which contain data in the database.  The table logically organized as row and column format like spreadsheet. Row in table represents the unique record and column represent field in that record. How many tables are allowed in the database? It is actually how many objects are allowed In the database and value is 2,147,483,647. How many columns does the table contain? A user-defined table may contain 1024 columns. How many rows does the table contain? There is no limitation on rows…

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Database In Action By Sagar Jaybhay

Database By Sagar Jaybhay It is an organized collection of structured information or data, typically stored electronically in a computer system. It is usually controlled by DBMS. In general data and DBMS along with the application which is associated with them is referred to as a database system. DBMS- database management system is an interface between the database and the end-user. SSMS(SQL Server Management Studio) it is only a client tool that connects the database. It is not server a just software that connects to a database server by using…

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