UrbanPro
true

Learn MS SQL from the Best Tutors

  • Affordable fees
  • 1-1 or Group class
  • Flexible Timings
  • Verified Tutors

Search in

Truncate, Drop And Delete Commands In SQL

Umasankar Natarajan
07/07/2017 0 0

Truncate:

  • Truncate command will delete the Table data only, it keeps the table schema as it is.
  • Table data Can be rollback
  • Example : TRUNCATE TABLE User;

Drop:

  • Drop command will delete both Table data table schema.
  • Table data Can be rollback
  • Example : DROP TABLE User;

Delete:

  • Delete command will delete the particular row based on the criteria in Where clause. If where clause is not mention in the squre, it will delete entire data, that is equalent to Truncate command action.
  • Once delete the data, data can not be rollback. Make sure to include where clause in the delete query.
  • Example : DELETE FROM User WHERE userid = 5;

Note: This concept will work only for MS SQL. It may be different or reverse in oracle sql and MySQL

0 Dislike
Follow 0

Please Enter a comment

Submit

Other Lessons for You

What Are Macros?
i. Macros are little programs that run within Excel and help automate common repetitive tasks. Macros are one of Excel's most powerful, yet underutilized feature. Using macros, you can save hours and boost...

What is Big Data and Why Do Organizations Need It?
Big data is a term that describes the large volume of data – both structured and unstructured – that inundates a business on a day-to-day basis. But it’s not the amount of data that’s...

Cursors In SQL Server
First thing first Usage of Cursors is not encouraged in SQL Server as they are slow. You may go with While loop if you need to iterate through a recordset. Cursor is a database object to retrieve data...

R programming language
R is a programming language and software environment for statistical computing and graphics supported by the R Foundation for Statistical Computing. The R language is widely used among statisticians and...

X

Looking for MS SQL Classes?

The best tutors for MS SQL Classes are on UrbanPro

  • Select the best Tutor
  • Book & Attend a Free Demo
  • Pay and start Learning

Learn MS SQL with the Best Tutors

The best Tutors for MS SQL Classes are on UrbanPro

This website uses cookies

We use cookies to improve user experience. Choose what cookies you allow us to use. You can read more about our Cookie Policy in our Privacy Policy

Accept All
Decline All

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 55 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 7.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more