[Term Entry] SQL NULL SAFE EQUAL Operator #5205

SlappyChappy · 2024-09-09T17:49:53Z

Description

Adding SQL NULL SAFE EQUAL operator to SQL concepts under docs/content/sql/concepts/operators/terms/null-safe-equal/null-safe-equal.md.

I am making this contribution as part of my Git & Github course on Codecademy.

Issue Solved

Closes #5166

Type of Change

Adding a new entry

Checklist

All writings are my own.
My entry follows the Codecademy Docs style guide.
My changes generate no new warnings.
I have performed a self-review of my own writing and code.
I have checked my entry and corrected any misspellings.
I have made corresponding changes to the documentation if needed.
I have confirmed my changes are not being pushed from my forked main branch.
I have confirmed that I'm pushing from a new branch named after the changes I'm making.
I have linked any issues that are relevant to this PR in the Issues Solved section.

CLAassistant · 2024-09-09T17:49:59Z

All committers have signed the CLA.

SaviDahegaonkar

Hey @SlappyChappy ,
I had a look at your PR and suggested a few changes to you that should be made asap to get it approved as a first review.

Thanks,
Savi

SaviDahegaonkar · 2024-09-10T17:23:27Z

content/sql/concepts/operators/terms/null-safe-equal/null-safe-equal.md

@@ -0,0 +1,40 @@
+---
+Title: 'NULL SAFE EQUAL'
+Description: 'Performs an inequality comparison similar to the '=' operator, using the logic of an XNOR gate. Can accept NULL as a value and will not output NULL.'


Suggested change

Description: 'Performs an inequality comparison similar to the '=' operator, using the logic of an XNOR gate. Can accept NULL as a value and will not output NULL.'

Description: 'Performs an equality comparison similar to the '=' operator, using the logic of an XNOR gate. Can accept NULL as a value and ensures comparisons involving NULL do not result in NULL.

Here I have corrected inequality comparison to equality comparison because that is the correct logic for null safe equal operator in SQL.

SaviDahegaonkar · 2024-09-10T17:27:31Z

content/sql/concepts/operators/terms/null-safe-equal/null-safe-equal.md

+Tags: 
+  - 'Operators'
+  - 'Database'
+  - 'Queries'
+  - 'Tables'


Suggested change

Tags:

- 'Operators'

- 'Database'

- 'Queries'

- 'Tables'

Tags:

- 'Operators'

- 'Database'

- 'Queries'

- 'Tables'

Include only those tags that are already present in the tags.md list and you can add one if you want to include it in your PR. Here operators is not part of the tags list so you can add it if you want it to be used.

SaviDahegaonkar · 2024-09-10T17:32:56Z

content/sql/concepts/operators/terms/null-safe-equal/null-safe-equal.md

+  - 'paths/analyze-data-with-sql'
+---
+
+The **'NULL SAFE EQUAL'** operator performs an equality comparison like the '=' operator. However it can also accept NULL values and never returns NULL, instead always returning TRUE or FALSE. It uses the logic of an XNOR gate to determine the value returned.


Suggested change

The **'NULL SAFE EQUAL'** operator performs an equality comparison like the '=' operator. However it can also accept NULL values and never returns NULL, instead always returning TRUE or FALSE. It uses the logic of an XNOR gate to determine the value returned.

The **`NULL SAFE EQUAL`** operator performs an equality comparison like the '=' operator. However, it can also accept NULL values and never returns NULL, instead always returning TRUE or FALSE. It uses the logic of an XNOR gate to determine the value returned.

SaviDahegaonkar · 2024-09-10T17:40:52Z

content/sql/concepts/operators/terms/null-safe-equal/null-safe-equal.md

+
+The **'NULL SAFE EQUAL'** operator performs an equality comparison like the '=' operator. However it can also accept NULL values and never returns NULL, instead always returning TRUE or FALSE. It uses the logic of an XNOR gate to determine the value returned.
+
+The 'NULL SAFE EQUAL' function is useful for when an XNOR gate that can accept NULL values and always returns True or False is needed.


Suggested change

The 'NULL SAFE EQUAL' function is useful for when an XNOR gate that can accept NULL values and always returns True or False is needed.

The `NULL SAFE EQUAL` operator is useful when an XNOR-like logic is required for comparisons that can accept NULL values and always return True or False.

The NULL SAFE EQUAL is an operator so it must be enclosed in ..... backticks, also removed the function word as it is not a function.
Also, NULL SAFE EQUAL operator is useful when XNOR-like logic is required not literally an XNOR gate.

SaviDahegaonkar · 2024-09-10T17:43:14Z

content/sql/concepts/operators/terms/null-safe-equal/null-safe-equal.md

+
+> **Note:** The syntax can vary across different SQL flavors. In PostgreSQL, the operator is written as 'a IS NOT DISTINCT FROM b'. In MariaDB/MySQL, it is written as 'a <=> b'. Finally, in SQLite, it is written as 'a IS b'.
+
+## MySQL Syntax


Suggested change

## MySQL Syntax

## Syntax

Removed MYSQL as it is not necessary here, only the word syntax is sufficient.

SaviDahegaonkar

Hey @SlappyChappy ,
I had a look at your PR and suggested some changes to you. Please make them asap to get it approved

Thanks,
Savi

SlappyChappy · 2024-09-10T19:32:04Z

@SaviDahegaonkar I have made a second commit following the suggestions you have made. Please let me know if you have any other comments. One thing to note was that I am not fully sure of what you mean regarding the 'Operators' tag, as when I looked in docs/documentation/tags.md, I was able to find it in there, so please let me know if I need to modify the tags section again.

SaviDahegaonkar

Hey @SlappyChappy ,
I had a look at your PR. I have suggested a few more changes to you please make them asap.

Thanks,
Savi

SaviDahegaonkar · 2024-09-11T12:24:50Z

content/sql/concepts/operators/terms/null-safe-equal/null-safe-equal.md

+
+The **`NULL SAFE EQUAL`** operator performs an equality comparison like the '=' operator. However, it can also accept NULL values and never returns NULL, instead always returning TRUE or FALSE. It uses the logic of an XNOR gate to determine the value returned.
+
+The 'NULL SAFE EQUAL' operator is useful for when XNOR-like logic is required for comparisons that can accept NULL values and always return True or False is needed.


Suggested change

The 'NULL SAFE EQUAL' operator is useful for when XNOR-like logic is required for comparisons that can accept NULL values and always return True or False is needed.

The `NULL SAFE EQUAL` operator is useful when XNOR-like logic is required for comparisons that can accept NULL values and always return True or False.

NULL SAFE EQUAL is an operator therefore it must be enclosed in (.....) backticks.

SaviDahegaonkar · 2024-09-11T12:28:07Z

content/sql/concepts/operators/terms/null-safe-equal/null-safe-equal.md

+```pseudo
+SELECT column1
+FROM table
+WHERE column1 <=> condition
+```


Suggested change

```pseudo

SELECT column1

FROM table

WHERE column1 <=> condition

```

```pseudo

SELECT column1

FROM table

WHERE column1 <=> value;

The NULL SAFE EQUAL operator <=> does the comparison between two values , not with the word "condition".

SlappyChappy · 2024-09-11T14:54:50Z

@SaviDahegaonkar I have incorporated your suggestions. Please let me know if there is anything else to amend. Thank you.

SaviDahegaonkar

Hey @SlappyChappy ,
The entry is nicely written. I think it is ready for a second round of review.

Thanks

SaviDahegaonkar · 2024-09-26T12:57:40Z

content/sql/concepts/operators/terms/null-safe-equal/null-safe-equal.md

@@ -0,0 +1,41 @@
+---
+Title: 'NULL SAFE EQUAL'
+Description: 'Performs an equality comparison similar to the '=' operator, using the logic of an XNOR gate. Can accept NULL and ensures comparisons involving NULL do not result in NULL.'


Suggested change

Description: 'Performs an equality comparison similar to the '=' operator, using the logic of an XNOR gate. Can accept NULL and ensures comparisons involving NULL do not result in NULL.'

Description: 'Performs an equality comparison similar to the '=' operator, using the logic of an XNOR gate. It accepts NULL values and ensures that comparisons involving NULL do not result in NULL.'

SaviDahegaonkar · 2024-09-26T13:04:26Z

content/sql/concepts/operators/terms/null-safe-equal/null-safe-equal.md

+  - 'paths/analyze-data-with-sql'
+---
+
+The **`NULL SAFE EQUAL`** operator performs an equality comparison like the '=' operator. However, it can also accept NULL values and never returns NULL, instead always returning TRUE or FALSE. It uses the logic of an XNOR gate to determine the value returned.


Suggested change

The **`NULL SAFE EQUAL`** operator performs an equality comparison like the '=' operator. However, it can also accept NULL values and never returns NULL, instead always returning TRUE or FALSE. It uses the logic of an XNOR gate to determine the value returned.

The **`NULL SAFE EQUAL`** operator performs an equality comparison like the '=' operator. However, it can also accept NULL values and never returns NULL; instead, it always returns TRUE or FALSE. It uses the logic of an XNOR gate to determine the value returned.

SaviDahegaonkar · 2024-09-26T13:13:25Z

content/sql/concepts/operators/terms/null-safe-equal/null-safe-equal.md

+
+The **`NULL SAFE EQUAL`** operator performs an equality comparison like the '=' operator. However, it can also accept NULL values and never returns NULL, instead always returning TRUE or FALSE. It uses the logic of an XNOR gate to determine the value returned.
+
+The `NULL SAFE EQUAL` operator is useful for when XNOR-like logic is required for comparisons that can accept NULL values and always return True or False is needed.


Suggested change

The `NULL SAFE EQUAL` operator is useful for when XNOR-like logic is required for comparisons that can accept NULL values and always return True or False is needed.

The `NULL SAFE EQUAL` operator is useful when XNOR-like logic is required for comparisons that can accept NULL values and always return True or False.

Sriparno08

Looks good, @SlappyChappy!

github-actions · 2024-10-07T06:20:09Z

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Created null-safe-equal markdown file and added content.

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SaviDahegaonkar self-assigned this Sep 9, 2024

SaviDahegaonkar added sql SQL entries new entry New entry or entries status: under review Issue or PR is currently being reviewed labels Sep 9, 2024

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Made changes as per Savi Dahegaonkar's suggestions

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SaviDahegaonkar suggested changes Sep 11, 2024

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Made further changes from suggestions.

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SaviDahegaonkar approved these changes Sep 26, 2024

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Sriparno08 and others added 2 commits October 7, 2024 11:21

Merge branch 'main' into null_safe_equal

1e7637b

Minor changes

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Sriparno08 merged commit c844a2e into Codecademy:main Oct 7, 2024
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Sriparno08 added status: review 2️⃣ completed hacktoberfest-accepted Indicates the PR was approved, merged, and pertains to Hacktoberfest and removed status: under review Issue or PR is currently being reviewed labels Oct 7, 2024

Sriparno08 removed the hacktoberfest-accepted Indicates the PR was approved, merged, and pertains to Hacktoberfest label Oct 7, 2024

	Description: 'Performs an inequality comparison similar to the '=' operator, using the logic of an XNOR gate. Can accept NULL as a value and will not output NULL.'
	Description: 'Performs an equality comparison similar to the '=' operator, using the logic of an XNOR gate. Can accept NULL as a value and ensures comparisons involving NULL do not result in NULL.

	The 'NULL SAFE EQUAL' operator performs an equality comparison like the '=' operator. However it can also accept NULL values and never returns NULL, instead always returning TRUE or FALSE. It uses the logic of an XNOR gate to determine the value returned.
	The `NULL SAFE EQUAL` operator performs an equality comparison like the '=' operator. However, it can also accept NULL values and never returns NULL, instead always returning TRUE or FALSE. It uses the logic of an XNOR gate to determine the value returned.


		The 'NULL SAFE EQUAL' operator performs an equality comparison like the '=' operator. However it can also accept NULL values and never returns NULL, instead always returning TRUE or FALSE. It uses the logic of an XNOR gate to determine the value returned.

		The 'NULL SAFE EQUAL' function is useful for when an XNOR gate that can accept NULL values and always returns True or False is needed.

	The 'NULL SAFE EQUAL' function is useful for when an XNOR gate that can accept NULL values and always returns True or False is needed.
	The `NULL SAFE EQUAL` operator is useful when an XNOR-like logic is required for comparisons that can accept NULL values and always return True or False.


		> Note: The syntax can vary across different SQL flavors. In PostgreSQL, the operator is written as 'a IS NOT DISTINCT FROM b'. In MariaDB/MySQL, it is written as 'a <=> b'. Finally, in SQLite, it is written as 'a IS b'.

		## MySQL Syntax


		The `NULL SAFE EQUAL` operator performs an equality comparison like the '=' operator. However, it can also accept NULL values and never returns NULL, instead always returning TRUE or FALSE. It uses the logic of an XNOR gate to determine the value returned.

		The 'NULL SAFE EQUAL' operator is useful for when XNOR-like logic is required for comparisons that can accept NULL values and always return True or False is needed.

[Term Entry] SQL NULL SAFE EQUAL Operator #5205

[Term Entry] SQL NULL SAFE EQUAL Operator #5205

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SlappyChappy commented Sep 9, 2024

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SlappyChappy commented Sep 10, 2024

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