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YouTubeYouTube Creators
NEW: YouTube Create App
The YouTube Create app lets you easily edit videos and Shorts right from your phone. No matter how simple or complex your ideas are, YouTube Create lets you bring them to life - completely free of charge. For more info and to download the app, check out the links below! Download the YouTube Create App here: https://play.google.com/store/apps ...
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Primary Key in SQL
Learn SQL: Primary Key
Learn SQL: Primary Key
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SQL Primary Key Explained Using Simple Examples.
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SQL Primary Key Explained Using Simple Examples.
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What is a Primary Key? - Definition from WhatIs.com
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What is a Primary Key? - Definition from WhatIs.com
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Primary Key Vs Foreign Key
Q1.Answer the following:(10)a. Is it mandatory for a foreign key to be a primary key in another table?b. Can foreign keys be null values in child relation?c. After enforcing foreign key constraint using on delete cascade rule, can you delete therecord in the child relation whose foreign key is not null before deleting the record in theparent relation?d. Can foreign keys have the duplicate values?e. Can there exist more than one foreign key in relation?Q2. Create fully normalized ERDs with primar
Q1.Answer the following:(10)a. Is it mandatory for a foreign key to be a primary key in another table?b. Can foreign keys be null values in child relation?c. After enforcing foreign key constraint using on delete cascade rule, can you delete therecord in the child relation whose foreign key is not null before deleting the record in theparent relation?d. Can foreign keys have the duplicate values?e. Can there exist more than one foreign key in relation?Q2. Create fully normalized ERDs with primar
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Foreign Key vs Primary Key - What is the Difference? - Essential SQL
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SQL Foreign key
SQL Foreign key
sqlshack.com
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