mirror of
https://github.com/kamranahmedse/developer-roadmap.git
synced 2026-09-19 09:32:03 +08:00
chore: sync content to repo (#10271)
Co-authored-by: nilbuild <4921183+nilbuild@users.noreply.github.com>
This commit is contained in:
github-actions[bot]
co-authored by
nilbuild
nilbuild
parent
15d1b1c3d8
commit
b15c379cbf
@@ -5,5 +5,4 @@ ACID are the four properties of relational database systems that help in making
|
||||
Visit the following resources to learn more:
|
||||
|
||||
- [@article@What is ACID Compliant Database?](https://retool.com/blog/whats-an-acid-compliant-database/)
|
||||
- [@article@What is ACID Compliance?: Atomicity, Consistency, Isolation](https://fauna.com/blog/what-is-acid-compliance-atomicity-consistency-isolation)
|
||||
- [@video@ACID Explained: Atomic, Consistent, Isolated & Durable](https://www.youtube.com/watch?v=yaQ5YMWkxq4)
|
||||
@@ -4,4 +4,4 @@
|
||||
|
||||
Visit the following resources to learn more:
|
||||
|
||||
- [@article@COUNT SQL Function](https://www.datacamp.com/tutorial/count-sql-function)
|
||||
- [@article@The SQL COUNT() Function](https://www.w3schools.com/sql/sql_count.asp)
|
||||
@@ -4,5 +4,4 @@ Data integrity constraints are rules you set up in a database to make sure the d
|
||||
|
||||
Visit the following resources to learn more:
|
||||
|
||||
- [@article@Integrity Constraints in SQL: A Guide With Examples](https://www.datacamp.com/tutorial/integrity-constraints-sql)
|
||||
- [@article@Integrity Constraints](https://dataheadhunters.com/academy/integrity-constraints-ensuring-accuracy-and-consistency-in-your-data/)
|
||||
- [@article@Integrity Constraints in DBMS: Key to Database Quality](https://www.theknowledgeacademy.com/blog/integrity-constraints-in-dbms/)
|
||||
@@ -4,4 +4,4 @@ Database security best practices are a collection of methods used to protect sen
|
||||
|
||||
Visit the following resources to learn more:
|
||||
|
||||
- [@article@What is database security?](https://azure.microsoft.com/en-us/resources/cloud-computing-dictionary/what-is-database-security)
|
||||
- [@article@What is database security?](https://www.ibm.com/think/topics/database-security)
|
||||
@@ -1,6 +1,6 @@
|
||||
# FLOOR
|
||||
|
||||
FLOOR is a numeric function that returns the largest integer value that is less than or equal to a given number. Effectively, it rounds a number *down* to the nearest whole number. For instance, FLOOR(7.9) would return 7, and FLOOR(-7.1) would return -8.
|
||||
FLOOR is a numeric function that returns the largest integer value that is less than or equal to a given number. Effectively, it rounds a number _down_ to the nearest whole number. For instance, FLOOR(7.9) would return 7, and FLOOR(-7.1) would return -8.
|
||||
|
||||
Visit the following resources to learn more:
|
||||
|
||||
|
||||
@@ -1,6 +1,6 @@
|
||||
# INNER JOIN
|
||||
|
||||
INNER JOINs combine rows from two or more tables based on a related column. They return only the rows where there is a match in the specified columns of all tables involved in the join. If there's no matching value in the joined columns, that row is excluded from the result set.
|
||||
INNER JOINs combine rows from two or more tables based on a related column. They return only the rows where there is a match in the specified columns of all tables involved in the join. If there's no matching value in the joined columns, that row is excluded from the result set.
|
||||
|
||||
Visit the following resources to learn more:
|
||||
|
||||
|
||||
@@ -1,8 +1,7 @@
|
||||
# JOINs
|
||||
|
||||
SQL JOINs let you combine data from two or more tables based on a related column between them. Think of it as linking information together to get a more complete view. The four most commonly used are: `INNER JOIN`, which returns rows only when there is a match in both tables; `LEFT JOIN`, which returns all rows from the left table and the matched rows from the right table (or NULL if there's no match); `RIGHT JOIN`, which returns all rows from the right table and the matched rows from the left table (or NULL if there's no match); and `FULL OUTER JOIN`, which returns all rows when there is a match in one of the tables.
|
||||
SQL JOINs let you combine data from two or more tables based on a related column between them. Think of it as linking information together to get a more complete view. The four most commonly used are: `INNER JOIN`, which returns rows only when there is a match in both tables; `LEFT JOIN`, which returns all rows from the left table and the matched rows from the right table (or NULL if there's no match); `RIGHT JOIN`, which returns all rows from the right table and the matched rows from the left table (or NULL if there's no match); and `FULL OUTER JOIN`, which returns all rows when there is a match in one of the tables.
|
||||
|
||||
Visit the following resources to learn more:
|
||||
|
||||
- [@article@SQL JOINs Cheat Sheet](https://www.datacamp.com/cheat-sheet/sql-joins-cheat-sheet)
|
||||
- [@video@SQL JOINs Tutorial for beginners](https://www.youtube.com/watch?v=0OQJDd3QqQM)
|
||||
@@ -4,5 +4,4 @@
|
||||
|
||||
Visit the following resources to learn more:
|
||||
|
||||
- [@article@Understanding the LAG function in SQL](https://www.datacamp.com/tutorial/sql-lag)
|
||||
- [@video@LAG and LEAD functions](https://www.youtube.com/watch?v=j2u52RQ0qlw)
|
||||
@@ -4,4 +4,4 @@ The `REPLACE` function in SQL is used to substitute all occurrences of a specifi
|
||||
|
||||
Visit the following resources to learn more:
|
||||
|
||||
- [@article@How to use the SQL REPLACE Function](https://www.datacamp.com/tutorial/sql-replace)
|
||||
- [@article@SQL REPLACE Function: Syntax, Usage, and Examples](https://mimo.org/glossary/sql/replace-function)
|
||||
@@ -4,4 +4,4 @@ The `ROUND` function in SQL is used to round a numeric value to a specified numb
|
||||
|
||||
Visit the following resources to learn more:
|
||||
|
||||
- [@article@What is the SQL ROUND Function and how does it work?](https://www.datacamp.com/tutorial/mastering-sql-round)
|
||||
- [@article@SQL ROUND Function: Syntax, Usage, and Examples](https://mimo.org/glossary/sql/round)
|
||||
@@ -1,6 +1,6 @@
|
||||
# Truncate Table
|
||||
|
||||
Truncate Table is a command in SQL used to remove all rows from a table. It's like resetting the table to its initial, empty state. The table structure itself (columns, data types, constraints) remains intact. `TRUNCATE TABLE` is generally faster than `DELETE` because it deallocates the data pages used by the table, rather than individually logging each row deletion.
|
||||
Truncate Table is a command in SQL used to remove all rows from a table. It's like resetting the table to its initial, empty state. The table structure itself (columns, data types, constraints) remains intact. `TRUNCATE TABLE` is generally faster than `DELETE` because it deallocates the data pages used by the table, rather than individually logging each row deletion.
|
||||
|
||||
Visit the following resources to learn more:
|
||||
|
||||
|
||||
@@ -4,5 +4,4 @@ Views are like virtual tables. Instead of physically storing data, a view's defi
|
||||
|
||||
Visit the following resources to learn more:
|
||||
|
||||
- [@article@Views in SQL](https://www.datacamp.com/tutorial/views-in-sql)
|
||||
- [@video@SQL Views Tutorial](https://www.youtube.com/watch?v=cLSxasHg9WY)
|
||||
@@ -1,6 +1,6 @@
|
||||
# WHERE Clause in SELECT Statements
|
||||
|
||||
The WHERE clause is a fundamental part of the SELECT statement in SQL. It filters the rows returned by a query based on a specified condition. Essentially, it allows you to retrieve only the data that meets certain criteria, enabling you to focus on specific subsets of information within your database tables.
|
||||
The WHERE clause is a fundamental part of the SELECT statement in SQL. It filters the rows returned by a query based on a specified condition. Essentially, it allows you to retrieve only the data that meets certain criteria, enabling you to focus on specific subsets of information within your database tables.
|
||||
|
||||
Visit the following resources to learn more:
|
||||
|
||||
|
||||
Reference in New Issue
Block a user