It is a SQL practice repository covering basics to advanced topics. It includes exercises on SELECT statements, WHERE clauses, GROUP BY, JOINS, window functions (OVER(), PARTITION BY), ROW_NUMBER(), ...
SQL (Structured Query Language) is a fundamental skill for anyone working in data management, whether you're a database administrator, data analyst, or software developer. For professionals looking to ...
-- a Trigger is a block of code that executes automatically executes when an event takes place in a table. -- for example we have these 2 tables, invoice and payments - when a client makes a payment ...
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