Experts List Down 13 SQL Commands That Are the Life Line of Your Assignment
The SQL assignments are one of the most critical writings which every IT and CS student has to prepare once in his academic year. It requires extensive research, wide study, and excellent writing skills to prepare a good SQL assignment. Students are required to have a deep understanding of SQL queries and commands to use in their assignments. These commands and queries are used to perform specific tasks and functions of data. It can perform various tasks like create a table, modify the table, and add data to your database table.
However, there are certain very basic SQL commands which every student must know. Here, we are sharing a list of that basic commands. This 13 points list is provided by experts who provide assignment assistance to students.
13 Essential SQL Commands for Your Assignment
- ALTER TABLE
ALTER TABLE table_name
ADD column_name datatype;
Usage: Adds columns to a table.
2. AVG()
SELECT AVG(column_name)
FROM table_name;
Usage: Returns the average value for a numeric column.
3. AS
SELECT column_name AS ‘Alias’
FROM table_name;
Usage: Allows you to rename a column or table using an alias.
4. BETWEEN
SELECT column_name(s)
FROM table_name
WHERE column_name BETWEEN value_1 AND value_2;
Usage: Filters the result set within a certain range. Values can be numbers, text, or dates.
5. AND
SELECT column_name(s)
FROM table_name
WHERE column_1 = value_1
AND column_2 = value_2;
Usage: Combines two conditions. Both conditions must be true for the row to be included in the outcome set.
6. CREATE TABLE
CREATE TABLE table_name (
column_1 datatype,
column_2 datatype,
column_3 datatype
);
Usage: It creates a new table in the database. It also allows to specify the name of the table and the name of each column in the table.
7. UPDATE
UPDATE table_name
SET some_column = some_value
WHERE some_column = some_value;
Usage: Used for editing the rows in a table.
8. HAVING
SELECT column_name, COUNT(*)
FROM table_name
GROUP BY column_name
HAVING COUNT(*) > value;
Usage: It was added to SQL commands because the WHERE keyword could not be used with aggregate functions.
9. LIKE
SELECT column_name(s)
FROM table_name
WHERE column_name LIKE pattern;
Usage: Used with the WHERE clause to search for a specific pattern in a column.
10. OR
SELECT column_name
FROM table_name
WHERE column_name = value_1
OR column_name = value_2;
Usage: Filters the result set to only include rows where either condition is true.
11. OUTER JOIN
SELECT column_name(s)
FROM table_1
LEFT JOIN table_2
ON table_1.column_name = table_2.column_name;
Usage: Combines rows from different tables even if the join condition is not met.
12. WITH
WITH temporary_name AS (
SELECT *
FROM table_name)
SELECT *
FROM temporary_name
WHERE column_name operator value;
Usage: Lets you store the result of a query in a temporary table using an alias.
13. SELECT
SELECT column_name
FROM table_name;
Usage: To fetch data from a database.
This was the complete list of SQL commands which every IT as well as CS student must know. Make sure that SQL commands you write support the operating system of your computer and the internet infrastructure you’re using. Till then, keep developing.
Summary: This article involves a list of 13 SQL commands which could be very essential for your assignments. These commands are listed by experts to help students of the regarding field.
