PHP Course For Beginners > MY SQL with PHP

Update & Delete in SQL

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The UPDATE command can be used to alter the value of a column after creating and populating a table in SQL. It will modify the value of all the rows in the table if there is no WHERE condition, so make sure you limit what it updates using a proper WHERE condition. Rows can be deleted with the DELETE command.

The UPDATE command modifies the database's existing records. The WHERE clause is used in conjunction with the UPDATE command to edit the database's limited records. The DELETE command is used to remove records from a database that are no longer needed.

To retrieve rows from a database table, use the SELECT SQL statement. To add new rows to a table, use the INSERT statement. To alter and update the values of an existing record, use the UPDATE statement. To erase records from a database table, use the DELETE statement.

In SQL Server, we can insert, update, and delete views.

Connect to a SQL Server Database Engine instance in Object Explorer, then expand that instance. Expand Databases, right-click the database you want to delete, and then select Delete from the drop-down menu. After you've double-checked that the correct database is selected, click OK.

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  1. Introduction to PHP
    10m 23s
  2. Understanding SDLC Process
    13m 58s
  3. How to use LearnVern
    3m 20s
  4. Client Server Architecture
    5m 18s
  5. How to set up PHP Environment?
    18m 6s

  1. What is Data
    8m 57s
  2. What is Database
    3m 25s
  3. What is DBMS
    14m 25s
  4. SQL Queries and its types
    16m 57s
  5. Data Types in SQL - from 16
    22m 41s
  6. SQL constraints
    10m 52s
  7. Create, Drop & Show Database
    13m 40s
  8. SQL Create Table
    13m 53s
  9. SQL Insert & Select Statement
    26m 56s
  10. Operators in SQL
    6m 47s
  11. In & NOt in Condition
    7m 4s
  12. Null & Not Null Condition
    4m 55s
  13. Clauses in SQL
    9m 46s
  14. Understanding Having, Distinct & Group by
    21m 54s
  15. Update & Delete in SQL
    12m
  16. Alter table command in SQL
    15m 29s
  17. MySQL Rename truncate Drop
    6m 34s
  18. Understanding Foreign key
    15m 37s
  19. MySQL joins
    22m 56s
  20. MySQL views
    18m 23s
  21. MySQL Function
    21m 39s
  22. MySQL Procedure
    15m 33s
  23. MySQL Trigger
    16m 15s
  24. Normalization
    16m 9s
  25. Assignment : MYSQL
    8m 56s

  1. Understanding HTTP Methods
    33m 26s

  1. Understanding PHP Program structure Comments in PHP
    13m 7s

  1. Variables in PHP
    11m 46s

  1. Arithmetic & Assignment Operators in PHP
    24m 28s
  2. Comparison & Logical Operators in PHP
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  3. Ternary Operator in PHP
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  4. Assignment : Operators
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  1. Super Global Variable in PHP
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  2. GET & POST Variable in PHP
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  3. $_FILES & $_ENV in PHP
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  4. Assignment : Super Global Variables
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  1. If-else in PHP
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  2. switch case in PHP
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  3. Assignment : Conditional Statements
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  1. Functions in PHP
    39m 46s
  2. Call by value vs Call by reference in PHP
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    5m 25s

  1. Array Functions in PHP
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  2. Array in PHP
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  3. Assignment : Array
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  1. String and its Functions in PHP
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  2. Assignment : String
    3m 44s

  1. Loops in PHP
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  2. More examples on Loops in PHP
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  3. Assignment : Loops
    8m 32s

  1. Cookies in PHP
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  1. Header Function in PHP
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  2. Assignment : Header Functions
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  1. Date and Time functions in PHP
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  2. Assignment : Date Time Functions
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  1. Include & Require Statement in PHP
    13m 52s

  1. Error Handling in PHP
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  1. File Upload in PHP
    42m 55s

  1. Database Connection in PHP Part 1
    29m 17s
  2. Database Connection in PHP Part 2
    32m

  1. SQL Injection in PHP
    30m 33s

  1. Crud - Registration and DB connection Part 1
    31m 31s
  2. Crud - Registration and DB connection Part 2
    24m 2s
  3. Log in Operation
    27m 24s
  4. Read Operation
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  5. Update Operation Part 1
    12m 53s
  6. Update Operation Part 2
    27m 17s
  7. Log out Operation
    9m 29s

  1. MySQL Interview Question 1
    33m 7s
  2. MySQL Interview Question 2
    25m 23s
  3. MySQL Interview Question 3
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