In order to write and execute SQL queries, we first have to create a connection to our desired Oracle database server. In this video, learn how to configure and save a database connection in SQL Developer.
- [Instructor] Before we can start using SQL Developer…to write and execute our SQL queries,…we first have to configure a new connection to…our Oracle database.…That's because Oracle SQL Developer is the program…or application we use to execute our SQL queries,…but it still needs to connect to an Oracle database…which contains the data we wish to query.…Oracle SQL Developer supports the ability to create…and configure multiple connections to multiple…Oracle databases.…However, for our course we'll only be using a single…connection to the HR or human resources schema that…comes pre loaded in the Oracle demo virtual machine.…
So, how to create a new connection?…Easily.…We'll use the Connections pane on the left side of the…screen and either click on the green plus button or…right click on connections and choose new connection.…In the next screen, we'll need to provide our…connection details.…For example, we need to give a name for our connection.…HR suits our use case as we will be…connecting to the HR schema.…We'll also need to specify the username and password.…
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
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Introduction
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Welcome1m 37s
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1. Introduction to SQL
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What is SQL?2m 30s
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Database tables2m 21s
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Overview of table data types4m 21s
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SQL query structure4m 38s
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2. Preparing the Course Environment
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Downloading the course VM2m 16s
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3. Using Oracle SQL Developer
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Exploring database objects1m 29s
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Filtering specific objects1m 25s
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Using SQL Developer tabs2m 18s
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Viewing query output1m 18s
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4. Basic SELECT Queries
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Using WHERE to filter dates2m 42s
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Using column aliases2m 18s
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Using ORDER BY3m 29s
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5. String, Number, and Date Functions
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Introduction to functions1m 39s
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Using LENGTH1m 4s
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Using CONCAT4m 48s
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Using LOWER and UPPER2m 44s
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Using INSTR4m 32s
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Using RPAD and LPAD3m 31s
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Using ROUND1m 15s
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Using TRUNC1m 36s
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Using SYSDATE1m 59s
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Using SYSTIMESTAMP1m 37s
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Using MONTHS_BETWEEN3m 2s
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Using ADD_MONTHS1m 17s
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6. Joining Table Data
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Joining data from tables4m 12s
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INNER JOIN1m 17s
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LEFT JOIN2m 55s
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RIGHT JOIN1m 55s
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FULL OUTER JOIN1m 59s
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7. Manipulating Data
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Creating a simple table2m 1s
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COMMIT and ROLLBACK2m 23s
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Introduction to transactions3m 43s
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Deleting rows for a table3m 23s
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Updating values2m 40s
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8. Grouping Data
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Using aggregate functions2m 24s
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Using GROUP BY2m 45s
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Using HAVING3m
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9. Advanced Topics
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Primary keys2m 47s
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NOT NULL constraints1m 36s
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Check constraints3m 2s
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Foreign key constraints6m 4s
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Subqueries4m 39s
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Conclusion
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Next steps1m 33s
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Video: Creating a connection to the database