Aliases in SQL acts as labels or nicknames for database columns making query output more readable and easier to understand. Learn how to use the AS syntax in the SQL language to create aliases for columns.
- [Narrator] We can add column aliases…which is a fancy name of saying labels…to the output of our SQL query.…For example, in the query we have executed…in our previous video, we have generated…two new calculated columns.…Salary after bonus and a bonus column.…Note that the actual header value,…the column name for both of these columns…is not very readable or legible.…We can change that by assigning a column alias…to be used in the query output.…
We do that using the AS keyword followed…by the new column alias value.…So I can type AS and in double quotation marks,…type salary plus bonus.…And for the second calculated column,…I can type AS bonus.…Running this query again will generate…more legible column names.…I can also do that for columns that exist…in the Employees table itself.…
And not just for columns whose values…are generated based on calculations.…So for example, instead of first_name,…I can type AS Employee First Name.…And instead of last_name, I can type…AS Employee Last Name.…Running this query with the new column aliases…
Author
David Yahalom
Released
1/17/2018Note: This training course is appropriate for beginning database developers with no prior experience with SQL or Oracle.
- Using Oracle SQL*Developer, the free development environment
- Selecting data from tables
- Filtering data
- Using functions to manipulate data
- Joining data from tables
- Creating tables
- Updating values
- Truncating data
- Grouping and ordering result sets
- Working with primary keys
- Checking constraints
Skill Level Beginner
Duration
Views
-
Introduction
-
Welcome1m 37s
-
-
1. Introduction to SQL
-
What is SQL?2m 30s
-
Database tables2m 21s
-
Overview of table data types4m 21s
-
SQL query structure4m 38s
-
-
2. Preparing the Course Environment
-
Downloading the course VM2m 16s
-
-
3. Using Oracle SQL Developer
-
Exploring database objects1m 29s
-
Filtering specific objects1m 25s
-
Using SQL Developer tabs2m 18s
-
Viewing query output1m 18s
-
4. Basic SELECT Queries
-
Using WHERE to filter dates2m 42s
-
Using column aliases2m 18s
-
Using ORDER BY3m 29s
-
5. String, Number, and Date Functions
-
Introduction to functions1m 39s
-
Using LENGTH1m 4s
-
Using CONCAT4m 48s
-
Using LOWER and UPPER2m 44s
-
Using INSTR4m 32s
-
Using RPAD and LPAD3m 31s
-
Using ROUND1m 15s
-
Using TRUNC1m 36s
-
Using SYSDATE1m 59s
-
Using SYSTIMESTAMP1m 37s
-
Using MONTHS_BETWEEN3m 2s
-
Using ADD_MONTHS1m 17s
-
-
6. Joining Table Data
-
Joining data from tables4m 12s
-
INNER JOIN1m 17s
-
LEFT JOIN2m 55s
-
RIGHT JOIN1m 55s
-
FULL OUTER JOIN1m 59s
-
7. Manipulating Data
-
Creating a simple table2m 1s
-
COMMIT and ROLLBACK2m 23s
-
Introduction to transactions3m 43s
-
Deleting rows for a table3m 23s
-
Updating values2m 40s
-
8. Grouping Data
-
Using aggregate functions2m 24s
-
Using GROUP BY2m 45s
-
Using HAVING3m
-
9. Advanced Topics
-
Primary keys2m 47s
-
NOT NULL constraints1m 36s
-
Check constraints3m 2s
-
Foreign key constraints6m 4s
-
Subqueries4m 39s
-
-
Conclusion
-
Next steps1m 33s
-
Take notes with your new membership!
Type in the entry box, then click Enter to save your note.
Press on any video thumbnail to jump immediately to the timecode shown.
Notes are saved with you account but can also be exported as plain text, MS Word, PDF, Google Doc, or Evernote.
Share this video
Embed this video
Video: Using column aliases