SQL Primary keys right 🔑 #codinglife #sql #programming
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YouTubeZeynep Küçük
SQL Primary keys right 🔑 #codinglife #sql #programming
💥 A primary key in SQL is a column (or a set of columns) that uniquely identifies each row in a table. Here are the key points about a primary key: Uniqueness → No two rows can have the same primary key value. Not NULL → A primary key column cannot contain NULL values. Only one per table → Each table can have only one primary key ...
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Primary key ...
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