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SQL certification

SQL certification

#sql-certification
0 followers·5 articles

SQL certification

#sql-certification·0 followers·5 articles
SQL certification
Roli
Roli
rolirai.hashnode.dev·Dec 13, 2023
Dec 13, 2023

What is HAVING clauses in SQL?

n SQL, the HAVING clause is a crucial part of a SQL query that is used to filter the results of a GROUP BY operation based on a specified condition. While the WHERE clause is used to filter rows before they are grouped, the HAVING clause filters the ...

Discuss·5 reads
SQL course
Sunil Metha
Sunil Metha
sunilmetha.hashnode.dev·Jul 03, 2023
Jul 03, 2023

What is Data Control Language in SQL

In SQL (Structured Query Language), Data Control Language (DCL) is a subset of commands that control and manage access to the database and its objects. DCL provides the necessary permissions and privileges to users or roles, enabling them to perform ...

Discuss·18 reads
SQL Training
Ekta Verma
Ekta Verma
ektavermabloger.hashnode.dev·Jun 13, 2023
Jun 13, 2023

What is Clustered Index in SQL?

In SQL, a clustered index is a type of index that determines the physical order of data in a table based on the values of one or more columns. Unlike non-clustered indexes, which create a separate structure that maps to the actual data, a clustered i...

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SQL Training

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