Oracle DML | DML Oracle | Data Manipulation Language
What is Data Manipulation Language (DML) ?
- A data manipulation language (DML) is a family of computer languages including commands permitting users to manipulate data in a database.
- Data manipulation language (DML) statements query and manipulate data in existing schema objects.
- These statements do not implicitly commit the current transaction.
![Oracle Command Types](https://wikitechy.com/tutorials/oracle/img\oracle-images\oracle-command-types.jpg)
- The following are the DML statements available in Oracle.
- INSERT
- UPDATE
- DELETE
- SELECT
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INSERT:
- The INSERT statement inserts rows into an existing table.
- The simplest form of the INSERT statement has this syntax:
![Oracle insert](https://wikitechy.com/tutorials/oracle/img/oracle-images/oracle-insert.gif)
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INSERT INTO table_name (list_of_columns)
VALUES (list_of_values);
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UPDATE:
- The UPDATE statement updates (changes the values of) a set of existing table rows.
- A simple form of the UPDATE statement has this syntax:
![Oracle create table](https://wikitechy.com/tutorials/oracle/img\oracle-images\create-table.gif)
SQL Insert and Update Table
UPDATE table_name
SET column_name = value [, column_name = value]...
[ WHERE condition ];
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![Oracle update](https://wikitechy.com/tutorials/oracle/img/oracle-images/oracle-update.gif)
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DELETE:
- The DELETE statement deletes rows from a table.
- A simple form of the DELETE statement has this syntax:
DELETE FROM table_name
[ WHERE condition ];
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![Oracle delete row using where](https://wikitechy.com/tutorials/oracle/img/oracle-images/oracle-delete-row-using-where.gif)
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- The SQL SELECT statement returns a result set of records from one or more tables.
- A SELECT statement retrieves zero or more rows from one or more database tables or database views . In most applications, SELECT is the most commonly used data query language (DQL) command.
SELECT:
![Oracle select from table](https://wikitechy.com/tutorials/oracle/img/oracle-images/oracle-select-from-table.gif)
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SELECT * FROM TABLE_NAME