Definition : This statement is used to remove one or more records permanently from the database table. Syntax : DELETE table-name; DELETE table-name where condition; Example : Problem : How to remove all data/records from a table permanently. SQL> Delete from employee; SQL> Delete * from employee; Problem : How Read more…
SELECT STATEMENT Basic Select Syntax : SELECT column_name1,column_name2… column_name_n FROM table-name[WHERE Clause][GROUP BY clause][HAVING clause][ORDER BY clause]; The SELECT query statement is used to retrieve stored data from a database in the form of table-like structure called result set. It is one of the largest use query/statement. Example : How Read more…
Definition : Insert into statement is used to add new or fresh record/s into an existing database table. Syntax : INSERT INTO table-name (field or attribute or column-name1, column-name2, column-name3, column-name4, column-name5) VALUES (value1, value2, value3, value4, value5 );(Press Enter) Example : For more Select query use this link
Create Table Definition : This statement creates a new/fresh table with various column or field names and respective datatypes in a database. Syntax : CREATE TABLE schema_name.table_name (column_name1 data_type1 column_constraint1, column_name2 data_type2 column_constraint2, . . . table_constraints ); CREATE TABLE table_name ( column_name1 data_type1 column_constraint1, column_name2 data_type2 column_constraint2, Read more…
Click this link to know How to Uninstall Oracle 10g from Window 7/8.1/10. Example : How to start/open oracle 10g from C-Command prompt/in MS-DOS ? Example : How to back at C-Command prompt/in MS-DOS from Oracle 10g SQL prompt ? Example : How to find SID name Read more…
Example : How to Start/open Oracle 10g/11g first time. Example : How to create new user in Oracle 10g/11g. Example : How to change/modify the current logged in user password in Oracle 10g/11g. Example : How to give administrator power to a newly created user in Oracle 10g/11g. Go to Read more…
Introduction DCL stands for Data Control Language. DCL statements are crucial for managing database security by controlling who has access to what data and what operations they can perform. Definition DCL statements are a collection of those SQL statements that are used to control security and concurrent access to the Read more…
Introduction of View View is a powerful feature of SQL that can significantly streamline our data management and querying processes. Definition View is a virtual table created using the CREATE VIEW statement from an existing table. Characteristics In SQL, a view is a virtual table based on the result set Read more…
DML stands for Data Manipulation Language. DML is used to manipulate database data i.e. DML statements are the collection of those SQL commands which are used to store or save or insert, retrieve or search, modify or change or update, and erase or remove or delete data from the database as per Read more…
DDL stands for ‘Data definition language’. DDL is subset of SQL and is a part of DBMS. DDL statements are the collection of those SQL commands which are used to create and manipulate the structures of a database/schema i.e. they are used to create database objects like databases, tables, users, Read more…