radha
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Dec 01, 2025
9:51 PM
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SQL( Structured Query Language) is the standard language used to interact with relational databases.
It allows druggies to fit , modernize, cancel, sludge, and recoup data efficiently. While SQL has numerous commands and operations,
the abecedarian structure blocks of nearly every SQL query are clauses.
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Understanding SQL clauses is essential because they help structure queries, control affair, sludge data, and define how records should be reused.
Whether you're a freshman, a data critic, a software tester, or a backend inventor, learning these
SQL clauses will significantly ameliorate your capability to work effectively with databases.
In SQL, there are six primary clauses generally used to make queries
SELECT
FROM
WHERE
GROUP in
Keeping
ORDER in
These clauses are used in a fixed order and combine to produce important queries that recoup accurate and meaningful information.
Let’s dive deeply into each clause, its purpose, real- time exemplifications, and how they work together.
1. elect Clause
The SELECT clause is the most constantly used clause in SQL. It tells the database what data you want to recoup.
Purpose of SELECT
Displays one or further columns
Can display all columns using *
Supports functions like COUNT(), MAX(), MIN(), SUM(), AVG()
Supports expressions and aliasing
illustration
SELECT name, age, megacity FROM scholars;
This retrieves the name, age, and megacity of all scholars.
elect with alias
SELECT payment * 12 AS annual_salary FROM workers;
Why SELECT matters
It forms the affair structure. Without the SELECT clause, no data can be recaptured or displayed.
2. FROM Clause
The FROM clause specifies the table( s) from which data must be recaptured.
Purpose of FROM
Determines the source of the data
Allows joining multiple tables
workshop with subqueries
illustration
SELECT * FROM workers;
This retrieves all columns from the workers table.
Join illustration
SELECT e.emp_name, d.dept_name
FROM workers e
JOIN Departments d ON e.dept_id = d.dept_id;
Why FROM matters
It tells SQL where to cost data from. Without FROM, SELECT can not serve in utmost queries.
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3. WHERE Clause
The WHERE clause filters records grounded on a condition. It's used to prize only the necessary data rather of reacquiring all rows.
Purpose of WHERE
Pollutants rows
Uses logical drivers( AND, OR, NOT)
Uses comparison drivers( = ,>, = , 50000;
This retrieves workers earning further than ? 50,000.
WHERE with multiple conditions
SELECT * FROM Products
WHERE order = ' Electronics'
AND price BETWEEN 10000 AND 50000;
Why WHERE matters
It improves effectiveness, delicacy, and performance by filtering out gratuitous data.
4. GROUP in Clause
The GROUP in clause groups rows that partake analogous values into summary rows. It's substantially used with aggregate functions.
Purpose of GROUP in
Groups data into orders
Helps cipher summaries, summations, and pars
workshop with COUNT(), SUM(), AVG(), MAX(), MIN()
illustration
SELECT department, COUNT( *) AS employee_count
FROM workers
GROUP in department;
This counts the number of workers in each department.
Multiple groupings
SELECT megacity, gender, COUNT( *)
FROM scholars
GROUP in megacity, gender;
Why GROUP in matters
It's pivotal for assaying large datasets, generating reports, and recapitulating data meaningfully.
5. HAVING Clause
The Keeping clause pollutants groups created by GROUP in. It acts like a WHERE clause but is applied after grouping.
Purpose of HAVING
Pollutants added up data
Applies conditions on grouped records
workshop only with GROUP in
illustration
SELECT department, COUNT( *) AS emp_count
FROM workers
GROUP in department
Keeping COUNT( *)> 10;
This displays only departments that have further than 10 workers.
Why Keeping matters
WHERE can not filter added up results. That’s why Keeping exists to apply conditions on grouped summaries.
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Why Choose Us?( IT Education Centre)
The IT Education Centre is one of Pune’s leading institutes for professional upskilling. We offer assiduity- concentrated
SQL Classes in Pune designed to help individualities make strong careers in IT,
analytics, and enterprise operations. Placement Support
100 placement backing
Resume- structure sessions
Mock interviews
HR fixing
Tie- ups with 700 IT & MNC companies
We help you land your first SQL- grounded job confidently.
Trainer Profile
Our coaches are
Assiduity experts with 10 – 15 times of experience
pukka database specialists
Endured in real- time SQL projects
Hands- on instructors who concentrate on practical literacy
Social Media Biographies
You can follow the IT Education Centre on
Facebook
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LinkedIn
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We post regular job updates, tutorials, and pupil success stories.
Reviews & GMB Star Rating
We maintain a strong online presence with
? GMB standing
2500 positive reviews
High pupil satisfaction
Verified conditions across Google, Justdial & Sulekha
Location & Contact
IT Education Centre – Pune
Available in
Deccan
Wakad
Hadapsar
Pimpri
Kothrud
Contact 91- 020 7117 3071
SevenMentor Training Institute
Website IT Education Centre
Syllabus( SQL Course figure)
preface to SQL & Databases
Installation & Setup
DDL, DML, DCL Commands
SELECT Queries
Functions & Drivers
Joins & Subqueries
Views & indicators
Stored Procedures & Alarms
Deals Real- time SQL systems SQL for Supply Chain
SQL for Material Management
Interview Preparation
15 FAQs – IT Education Centre( SQL Program)
1. Do you give practical SQL training?
Yes, 80 practical sessions.
2. Is this course suitable for newcomers?
Absolutely, no previous coding needed.
3. Do you offer weekend SQL batches?
Yes, both weekday & weekend batches are available.
4. Is placement backing included?
Yes, 100 placement support.
5. Do scholars get instrument after completion?
Yes, a honored course completion instrument is handed.
6. What databases will I learn?
MySQL, SQL Garçon, Oracle basics.
7. Do you offer a rally class?
Yes, one free rally session.
8. Will I learn real- time systems?
Yes, assiduity- position systems included.
9. Cannon-IT scholars enroll?
Yes, numerous of our top players arenon-IT graduates.
10. Do you offer online SQL training?
Yes, online offline options available.
11. What's the course duration?
generally 6 – 8 weeks.
12. Do you help with interview medication?
Yes, mock interviews and renew sessions included.
13. Is the SQL instrument assiduity- honored?
Yes, accepted by IT and MNC companies.
14. Do you cover advanced SQL motifs?
Yes, including Joins, Alarms, and Stored Procedures.
15. Is EMI available for freights?
Yes, flexible payment options are handed.
Final studies
SQL is one of the most important chops for anyone entering the world of data and IT.
Whether you want to work in software development, business analytics, ERP systems, or
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