Saturday , July 21 2018

Lesson 1:What is HTML5?

What is HTML5? HTML 5 is the new standard for HTML.it is a markup language used for structuring and presenting content on the World Wide Web. It is the fifth and current version of the HTML standard. The previous version of HTML, HTML 4.01, came in 1999. The web has changed a lot …

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Create Not Null Constraint in sql Server

Create Not Null Constraint in sql Server: Not Null: If it is imposed on a column that column will not allow Null Values into it; this can be imposed on any no of columns. Syntax:- [crayon-5b527b3173b5c096544940/] Example:- [crayon-5b527b3173b66962438165/] Explanation:-  The above Example Explains you the Empid Column Not allowed Null …

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Create Check Constraint in Sql Server

Create Check Constraint in Sql Server Check Constraint: If we want to check the values present in a column to be according to a specified value we use this constraint. Syntax: [crayon-5b527b31742b1070338188/]     Example: [crayon-5b527b31742b8985695966/] Explanation: The Above Example Explains you the Employee salary Should be more than 1000 .If …

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Create Default Constraint in Sql Server

Create Default Constraint in Sql Server Default Constraint:-It is useful to provide default value into a column when user will not provide any value while inserting the data into the table then default value will be arranged. Column Level Definition: In this case the constraint definition is immediately followed after …

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Create Unique Constraint In Sql Server

Create Unique Constraint In Sql Server Unique Constraint:-  When  we  place UNIQUE constraint on any column ,It will not allow duplicate values but it allows single null value. Unique  Key Constraints can be imposed in two different ways: 1.Column Level Definition 2.Table Level Definition Column Level Definition: In this case …

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TRANSACTIONS CONTROL LANGUAGE(TCL) In Sql Server:

TRANSACTIONS CONTROL LANGUAGE (TCL):  Transaction is nothing but a unit of work. We can control these transactions using the following statements ROLLBACK Statement COMMIT Statement SAVE TRAN [SACTION] 1.ROLLBACK Statement: ROLLBACK statement is used to cancel a particular performed transaction. 2. COMMIT Statement: COMMIT statement makes a transaction permanent. It …

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DATA CONTROL LANGUAGE(DCL) In Sql Server

DATA CONTROL LANGUAGE(DCL)  In Sql Server DATA CONTROL LANGUAGE: By Using DCL We Can control the data between different user accounts. DCL Commands Includes GRANT Statement       2.REVOKE Statement   1.Grant Statement: By Using Grant Statement we can  grant the permissions (INSERT, SELECT, UPDATE, DELETE) on a specific table to …

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DATA MANIPULATION LANGUAGE(DML) In Sql Server:

DATA MANIPULATION LANGUAGE: INSERT Statement SELECT Statement UPDATE Statement DELETE Statement 1.INSERT Statement: By Using INSERT Statement   we can inserting the values into a specific table. 2.SELECT Statement: By Using SELECT Statement   we can retrieving the data from a specific table.  3.UPDATE Statement: By Using UPDATE Statement   we can modifying the data, which …

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Data Definition Language(DDL) Commands In Sql Server:

Data Definition Language(DDL) :- DDL Commands Includes CREATE Statement ALTER Statement DROP Statement TRUNCATE Statement   1. CREATE Statement: By using CREATE Statement we Can create Database Objects Like ( Tables, Views, Indexes,  User Defined Stored Procedures, User Defined Functions, Triggers, Rules,  Defaults) Syntax:-   2.ALTER Statement: By using ALTER Statement We Can modifying  the …

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Data Types in SQL SERVER

Data Types in SQL SERVER:    Data Type means the type of data which users provided to a specific column. In SQL Server 2 types of data types available which includes System Defined Data Types User Defined Data Types.       1.System Defined Data Types: SQL Server already contains …

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