Each SQL query is made from different parts, including SELECT, FROM, and WHERE, as well as others. In this video, explore the basic structure of the SQL query before moving on to hands-on exercises.
- Before we'll start writing our own SQL queries,…let's first understand at a high level,…the basic syntax which makes a SQL query…function and retrieve data from the database.…The core syntax of a SQL query…can be divided into a select clause,…a from clause, and usually also a where clause.…Let's review each one of these clauses,…and understand their function.…The from clause is where we specify…the name of the database table or tables,…in plural, from which we want to retrieve data.…
So for example, from employees specifies…that we want to retrieve data from the employees table.…The select clause, or select part…of our SQL query is where we can specify…the column names that we wish to return…as part of the output of our query,…so for example, if we have an employees table,…which contains three columns: ID, Name, and Salary,…and we specify in our SQL query…to select the ID and name column from employees,…we essentially tell Oracle to return…the ID and Name columns only, ignoring the Salary column,…for all records in our Oracle database,…
Note: 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
Database Foundations: Core Conceptswith Adam Wilbert2h 14m Beginner
Database Foundations: Administrationwith Adam Wilbert1h 14m Beginner
Oracle 12c Database: Administrationwith David Yahalom3h 58m Beginner
1. Introduction to SQL
2. Preparing the Course Environment
Downloading the course VM2m 16s
3. Using Oracle SQL Developer
4. Basic SELECT Queries
5. String, Number, and Date Functions
6. Joining Table Data
7. Manipulating Data
8. Grouping Data
9. Advanced Topics
Next steps1m 33s
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