SQL For Data Analysis > SQL Constraints & Alias

SQL Constraints

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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.
  • Solution: SELECT TABLE_NAME, CONSTRAINT_TYPE,CONSTRAINT_NAME.
  • Discussion: Use the view table_constraints in the information_schema schema.

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J
Juboraj Juboraj
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Explain details & easy to understand.

A
Aman Kanaujia
4

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.

S
Snehil
4

Everything is good but keyboard sounds more harsh and overlap your voice whereas this course is best.

F
FAROOK MOHAMMAD
5

Hello sir, explaination is excellent. I have a request please send the db in excel or SQL file.

H
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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Ashok Kumar Sonkar
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Super Duper Traning

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Harshit Chauhan
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Swati Patil
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Excellent

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Avinash Rawat
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  1. Getting Started
    18m 54s

  1. SQL Datatypes
    10m 5s
  2. SQL Commands
    21m 59s
  3. What is DBMS
    27m 51s
  4. What is RDBMS
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  1. Database Relationships
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  2. Primary Key
    6m 50s
  3. Unique Key
    3m 34s
  4. Foreign Key
    4m 2s
  5. Difference between PK, UK and PK & FK
    6m 6s

  1. SQL Server Installation Step by Step
    8m 2s

  1. How to Create Database in SQL Server
    13m 2s
  2. Assignment : SQL Create Table
    5m 5s

  1. SQL Constraints
    29m 1s
  2. SQL Insert Statement and SQL Alias
    28m 12s

  1. Filtering Data using Selection Command
    31m 53s
  2. Filtering Data using Comparison Operator
    28m 52s
  3. SQL Order by Clause
    25m 56s
  4. Assignment : Ordering and Filtering
    26m 58s

  1. Aggregate Functions in SQL for Data Analysis
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  2. SQL Mathematical Functions for Data Analysis
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  3. SQL String Functions for Data Analysis
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  4. SQL Date & Time Functions for Data Analysis
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  5. SQL Window Functions for Data Analysis
    23m 34s
  6. SQL Miscellaneous Functions
    20m 10s
  7. SQL Functions for Data Analytics - 1
    38m 28s
  8. SQL Functions for Data Analytics - 2
    40m 5s
  9. Rollup and NTile Function
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  10. Row Number Function
    8m 3s
  11. DenseRank and Cumulative Distribution
    29m 12s
  12. How to use SQL Conditional Statements
    4m 22s
  13. How to use SQL Group by Clause
    4m 55s
  14. SQL Practical with Examples
    49m 46s
  15. Assignment : SQL Date and Time
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  1. Type of Joins in SQL - INNER, LEFT
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  2. Type of Joins in SQL - RIGHT,SELF,FULL, CARTESIAN
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  3. SQL Joins Practical Session 1
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  4. SQL Joins Practical Session 2
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  5. SQL Joins Practical Session 3
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  6. SQL Joins Practical Session 4
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  7. SQL Joins Practical Session 5
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  8. Assignment : SQL Joins
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  9. Assignment : SQL Functions 1
    13m 25s
  10. Assignment : SQL Functions 2
    9m 25s

  1. Practice: SQL Subqueries
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  2. Practice: SQL Subqueries & Unions
    22m 29s
  3. SQL Correlated Subqueries Part 1
    20m 21s
  4. SQL Correlated Subqueries Part 2
    30m 51s
  5. SQL Correlated Subqueries Part 3
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  6. SQL Correlated Subqueries Part 4
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  7. SQL Correlated Subqueries Part 5
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  8. Correlated Select, Update & Delete Queries
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  9. SQL Union
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  10. SQL EXCEPT & INTERSECT
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  11. Assignment : SQL SubQueries
    30m 7s

  1. SQL Pivot, UnPivot Practical Example - 1
    37m 28s
  2. SQL Pivot, UnPivot Practical Example - 2
    27m 40s

  1. What are Views?
    22m 19s
  2. Examples of SQL Views Part -1
    16m 41s
  3. Examples of SQL Views Part -2
    17m 47s
  4. Assignment : SQL Views
    10m 17s

  1. What is SQL Index?
    13m 29s
  2. SQL Index types
    24m 50s

  1. Create Tables using Select Statement
    41m 2s
  2. Using Correlated Sub Query, Group By with Select Statement
    40m 2s
  3. Using Group By and Having Clauses with Select Statement
    23m 32s
  4. Using Index Optimizer with Select Statement
    23m 24s
  5. Using Union with Select Statement
    35m 4s
  6. Adding Multiple Records with Insert Statement
    22m 42s
  7. SQL Insert - Considerations and Best Practices
    9m 19s
  8. Insertion from Multiple Tables
    22m 11s
  9. SQL Delete - Types of Delete Operation Part -1
    16m 41s
  10. SQL Delete - Types of Delete Operation Part -2
    11m 38s
  11. Assignment : SQL Insert, Update & Delete
    7m 24s

  1. Loading & Connecting Different Files in SQL
    11m 18s

  1. Course Summary
    9m 6s

  1. Interview Questions Part 1
    22m 2s
  2. Interview Questions Part 2
    20m 56s

  1. Career Guideline
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