In this article we will learn about some of the frequently asked TypeScript programming questions in technical like “sql” Code Answer’s. When creating scripts and web applications, error handling is an important part. If your code lacks error checking code, your program may look very unprofessional and you may be open to security risks. Error or stack handling on typescript was simple and easy. An error message with filename, line number and a message describing the error is sent to the browser. This tutorial contains some of the most common error checking methods in Typescript. Below are some solution about “sql” Code Answer’s.
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SELECT - extracts data from a database
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UPDATE - updates data in a database
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DELETE - deletes data from a database
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INSERT INTO - inserts new data into a database
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CREATE DATABASE - creates a new database
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ALTER DATABASE - modifies a database
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CREATE TABLE - creates a new table
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ALTER TABLE - modifies a table
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DROP TABLE - deletes a table
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CREATE INDEX - creates an index (search key)
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DROP INDEX - deletes an index
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Let's create a database!
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Structured Query Language
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CREATE TABLE friends (
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id INTEGER,
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name TEXT,
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birthday DATE
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);
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INSERT INTO friends (id, name, birthday)
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VALUES (1, 'Jane Doe', '1990-05-30');
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INSERT INTO friends(id , name , birthday)
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VALUES(2 , 'APOORV' , '2000-2-2');
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UPDATE friends
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SET name = 'Jane Srivastava'
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WHERE id = 1;
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ALTER TABLE friends
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ADD COLUMN email TEXT;
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UPDATE friends
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SET email = '203029@klsafjls'
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where id = 1;
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UPDATE friends
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SET email = '203029@klsafjls'
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where id = 2;
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DELETE FROM friends
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WHERE id = 1;
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SELECT *
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FROM friends;
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SQL - the standard language to communicate with DBMS.
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SQL is a domain-specific language used in programming and designed for managing
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data held in a relational database management system, or for stream processing
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in a relational data stream management system.
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SELECT * FROM STUDENT
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DOWNLOAD XAMPP
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And then start apache and mysql then go to localhost/phpmyadmin
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What is SQL?
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SQL stands for Structured Query Language
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SQL lets you access and manipulate databases
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SQL became a standard of the American National Standards Institute (ANSI) in 1986, and of the International Organization for Standardization (ISO) in 1987
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What Can SQL do?
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SQL can execute queries against a database
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SQL can retrieve data from a database
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SQL can insert records in a database
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SQL can update records in a database
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SQL can delete records from a database
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SQL can create new databases
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SQL can create new tables in a database
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SQL can create stored procedures in a database
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SQL can create views in a database
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SQL can set permissions on tables, procedures, and views
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SQL stands for:
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Structured Query Language
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It's language which enables a user to create,
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modify and essentially interact with a database.
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As a tester we are usually using Data manipulation
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language part of SQL
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SQL has 2 parts:
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1-DATA MANIPULATION LANGUAGE
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It is used to add, retrieve or update the data.
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= insert, select, update, delete
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2-DATA DEFINITION LANGUAGE
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It is used to create database schema and can
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be used to define some constraints as well.
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=create, alter, drop, truncate
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create table
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create window etc.
