“lock in oracle”?
admin
Depending on the context, it could mean several things:
oracle
Indexing
In Oracle, you create an index using the CREATE INDEX statement. Syntax Example 1: Create a Simple Index Suppose you have an employees table: This creates an index on the…
sequence
In Oracle, a sequence is a database object that generates unique numeric values, often used to create primary key values automatically. Syntax to create a sequence Example Create a sequence:…
View
In Oracle, a View is a virtual table created from the result of a SQL query. It does not store data itself; instead, it stores the SQL statement. Whenever you…
Oracle Material
CS-15Download
Oracle SQL Operator
Below are the commonly used Oracle SQL Operators with their definitions and examples. Operator Description Example ALL Used to compare a value with all values returned by a subquery. The…
Oracle JOIN Query
A JOIN in Oracle is used to combine rows from two or more tables based on a related column between them. Sample Tables STUDENT Table STUDENT_ID NAME DEPT_ID 101 Amit…
Oracle Query
CREATE TABLE S1_123 (StudentID INT,Name VARCHAR(50) NOT NULL);insert into s1_123 values(1,’aaa’);select * from s1_123;alter table s1_123 add(email varchar2(100) unique);alter table s1_123 modify(StudentID Int Primary Key);insert into s1_123 values(2,’aaa’,’123@gmail.com’);desc s1_123;insert into…
CREATE Command in SQL
The CREATE command is a DDL (Data Definition Language) command used to create database objects such as tables, views, indexes, and databases. Syntax Create a Table Example 1: Create Student…
SQL Data Types
SQL Data Types specify the type of data that can be stored in a table column. They help ensure data accuracy and efficient storage. 1. Character (String) Data Types Data…