Important Operations of DML

Data manipulation language Commands (SELECT, INSERT, UPDATE and DELETE) and DML Operations (Insert data, Update data, Retrieve data and Deletes all records).
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Gowtham Ramesh
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Joined: Thu Nov 22, 2018 5:23 am

Important Operations of DML

Post by Gowtham Ramesh » Wed Nov 28, 2018 11:23 am

What are the important operations of Data Manipulation Language?

David
Posts: 44
Joined: Wed Nov 28, 2018 1:06 pm

Re: Important Operations of DML

Post by David » Wed Nov 28, 2018 1:25 pm

DML is a subset of SQL, Data Manipulation Language commands are used to store, modify, retrieve, and delete data from database tables. In this category we have Select, Insert, Update, Delete Commands….

Important DML Commands are,
1) SELECT – Retrieves data from a table
2) INSERT – Inserts data into a table
3) UPDATE – Updates existing data into a table
4) DELETE – Deletes all records from a table

Note: SELECT command is important for Database Testing.

swathi
Posts: 134
Joined: Fri Nov 23, 2018 2:52 am

Re: Important Operations of DML

Post by swathi » Tue Dec 04, 2018 12:13 pm

DML (Data Manipulation Language): These statements are used to manipulate the data in records. Commonly used DML statements are Insert, Update, and Delete.

The Select statement is used as partial DML statement that is used to select all or relevant records in the table.

srini
Posts: 85
Joined: Thu Jan 03, 2019 3:58 am

Re: Important Operations of DML

Post by srini » Thu Jan 10, 2019 5:30 am

Definition:
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A data manipulation language (DML) is a family of computer languages including commands permitting users to manipulate data in a database. This manipulation involves inserting data into database tables, retrieving existing data, deleting data from existing tables and modifying existing data. DML is mostly incorporated in SQL databases.
The functional capability of DML is organized in manipulation commands like SELECT, UPDATE, INSERT INTO and DELETE FROM

SELECT: This command is used to retrieve rows from a table. The syntax is SELECT [column name(s)] from [table name] where [conditions]. SELECT is the most widely used DML command in SQL.

UPDATE: This command modifies data of one or more records. An update command syntax is UPDATE [table name] SET [column name = value] where [condition].

INSERT: This command adds one or more records to a database table. The insert command syntax is INSERT INTO [table name] [column(s)] VALUES [value(s)].

DELETE: This command removes one or more records from a table according to specified conditions. Delete command syntax is DELETE FROM [table name] where [condition].

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