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The Go Workshop

You're reading from   The Go Workshop Learn to write clean, efficient code and build high-performance applications with Go

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Product type Paperback
Published in Dec 2019
Publisher Packt
ISBN-13 9781838647940
Length 824 pages
Edition 1st Edition
Languages
Tools
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Authors (6):
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Sam Hennessy Sam Hennessy
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Sam Hennessy
Andrew Hayes Andrew Hayes
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Andrew Hayes
Gobin Sougrakpam Gobin Sougrakpam
Author Profile Icon Gobin Sougrakpam
Gobin Sougrakpam
Jeremy Leasor Jeremy Leasor
Author Profile Icon Jeremy Leasor
Jeremy Leasor
Delio D'Anna Delio D'Anna
Author Profile Icon Delio D'Anna
Delio D'Anna
Dániel Szabó Dániel Szabó
Author Profile Icon Dániel Szabó
Dániel Szabó
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Toc

Table of Contents (21) Chapters Close

Preface 1. Variables and Operators FREE CHAPTER 2. Logic and Loops 3. Core Types 4. Complex Types 5. Functions 6. Errors 7. Interfaces 8. Packages 9. Basic Debugging 10. About Time 11. Encoding and Decoding (JSON) 12. Files and Systems 13. SQL and Databases 14. Using the Go HTTP Client 15. HTTP Servers 16. Concurrent Work 17. Using Go Tools 18. Security 19. Special Features Appendix

Truncating and Deleting Table

What we would like to achieve in this topic is to empty a table completely and get rid of it. In order to empty the table, we could simply formulate DELETE statements that match every record in our table and thus remove every single record from our table. However, there is a more elegant way. We can use the TRUNCATE TABLE SQL statement. The result of this statement is a literally empty table. We can use the Exec() function from our sql package. You already know how to initialize the package with imports. You also know how to connect to the database. This time, we only focus on the statements.

The following statement will achieve a full TRUNCATE:

EmptyTable, EmptyTableErr := db.Exec("TRUNCATE TABLE test")
if EmptyTableErr != nil {
  panic(EmptyTableErr)
}

The result of this is an empty table called test.

In order to get rid of the table completely, we should modify our statement as follows.

DropTable, DropTableErr := db...
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