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ETL - Extract, Transform and Load - SQL Tutorial
SQL Tutorial - Learn SQL
What is ETL?
ETL stands for Extract, Transform and Load, which is a process used to collect data from various sources, transform the data depending on business rules/needs and...
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SQL IN - SQL Tutorial
SQL IN - SQL Tutorial
THE
SELECT Column1, Column2, Column3,
Lets use the EmployeeHours table to illustrate how
SQL IN works:
SQL IN clause:
WHERE Date IN ('...
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SQL Tutorial - Learn SQL
SQL is short for Structured Query Language and is a widely used database language, providing means of data manipulation (store, retrieve, update, delete) and database creation.
If you need a quick SQ...
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SQL AND & OR - SQL Tutorial
SQL Tutorial - Learn SQL
The
SQL AND clause is used when you want to specify more than one condition in
your SQL WHERE clause, and at the same time you want all conditions to be true....
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SQL GROUP BY - SQL Tutorial
SQL Tutorial - Learn SQL
The
SQL GROUP BY statement is used along with the SQL aggregate functions like
SUM to provide means of grouping the result dataset by certain database table
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SQL BETWEEN - SQL Tutorial
SQL BETWEEN - SQL Tutorial
The
SELECT Column1, Column2, Column3,
The 2 values defining the range for
SQL BETWEEN clause can be dates, numbers or just text.
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