VIDEO
Purpose of Data Query Language (DQL)
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Identify DQL command
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Explain how to write structured query language (SQL) statements for data retrieval using: - SELECT statement - WHERE cla
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Construct SQL queries to retrieve specific data
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Identify the purpose of aggregate functions. (COUNT, SUM, AVG, MIN, MAX)
Explain how to write SQL statements for data retrieval with aggregate functions
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Construct queries using aggregate functions
Identify the purpose of GROUP BY and HAVING clauses
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Explain how to write SQL statements for grouping and filtering data
Construct queries using GROUP BY and HAVING clauses
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Identify the purpose of JOIN clause (NATURAL JOIN, INNER JOIN,EQUI JOIN)
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Explain how to write SQL statements for joining tables
Construct queries using JOIN clause