SQL constraints are rules that a table's data must follow. The type of data that can be entered into a table is limited by constraints. This ensures that the data in the table is accurate and reliable. The action is cancelled if there is a conflict between the constraint and the data action.
Domain constraint.
Tuple Uniqueness constraint.
Key constraint.
Entity Integrity constraint.
Referential Integrity constraint.
There are six basic limitations that are often used in SQL Server, and we'll go through them in depth with examples in this and the following articles.
There are five different types of constraints: A NOT NULL constraint is a restriction in a table that forbids null values from being entered in one or more columns. A unique constraint (also known as a unique key constraint) is a rule in a table that prevents duplicate values in one or more columns.
Problem: You want to find the names of the constraints in a table in SQL Server.
Example: We want to display the names of the constraints in the table student.
Discussion: Use the view table_constraints in the information_schema schema.
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Arvind Kumar
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very nice course for begginer to under stand
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hemant
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Hello sir, explaination is excellent. I have a request please send the db in excel or SQL file
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Juboraj Juboraj
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Explain details & easy to understand.
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Aman Kanaujia
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All good , but provide the data also for the assignment , Without data the interest is less day by day from the course. So, try to solve this problem as asap.
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Snehil
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Everything is good but keyboard sounds more harsh and overlap your voice whereas this course is best.
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FAROOK MOHAMMAD
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Hello sir, explaination is excellent. I have a request please send the db in excel or SQL file.
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Hari Prakash
4
In SQL Join Function's 2nd video - Teacher's voice dose not match with background content that are plays
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Aakash Mavar
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Hello sir
Mera Abhi graduation hu he Mene Mechanical Engineering BTech ki Hai me Data analysis me Apna career Bana skat ho Kya
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