SQL
-
GRANT and REVOKE Commands
In SQL, GRANT and REVOKE are two commands used to manage user permissions and access control for database objects. These…
Read More » -
Creating Views in SQL
In SQL, views are virtual tables that are created based on a SELECT query. They are not stored as physical…
Read More » -
CURSORS IN SQL
A cursor in SQL is a temporary work area created in system memory when a SQL statement is executed. A…
Read More » -
Embedded SQL
Programs written in high level languages such as C/C++ can use EMBEDDED SQL to access and update data stored in…
Read More » -
what is a sequence
In database management systems, a sequence is an object that generates a sequence of unique numbers or values on demand.…
Read More » -
SUB QUERIES /NESTED QUERIES
Subqueries, also known as nested queries, are SQL statements within other SQL statements. These queries are used to retrieve data…
Read More » -
JOINS in SQL
Structured Query Language (SQL) is a widely used programming language that is used to manage and manipulate data in relational…
Read More » -
FUNCTIONS IN SQL
Functions in SQL are predefined procedures that take input values, perform an operation, and return a single value or a…
Read More » -
Update, Delete, DROP commands in SQL
Update, Delete, DROP commands in SQL Update UPDATE is the SQL verb that changes or modifies data values in a…
Read More » -
Aggregate Functions in SQL
Aggregate functions in SQL are used to perform calculations on a set of values and return a single value. These…
Read More » -
Queries in SQL (Select, FROM, WHERE, GROUP BY, ORDER BY, HAVING)
Queries are a group of commands used to extract data from tables in a database using some SQL constructs. Queries…
Read More » -
Insert Operation in SQL
Insert Operation After creating the tables, we have to insert data in it so that it can be called database. …
Read More » -
Alter table command in SQL
Alter table command Learn to create table We can change the definition of a table even after creating it. For…
Read More » -
Integrity Constraints in SQL
Integrity Constraints While creating a table you can place certain Constraints/limitations on the values stored in the table. Different constrains…
Read More » -
Create Table Command
Create Table Command Tables are defined with the create table command. Create Table command basically defines a table name describing…
Read More »