
Run a simple sql query to return all columns and rows from the customer table using select star, and execute it with a semicolon in sql server management studio.
Select only the needed columns from a table, use aliases with as and quotes for spaces, format long queries with line breaks, and end with a semicolon.
Extract distinct values from a table using the distinct keyword, illustrated with district id and ordering by district id to reveal unique districts.
Learn how the group by clause adds detail to aggregates, returning one row per segment or category by grouping non-aggregate columns and using order by to structure results.
Use the date difference function in SQL to compute age from a birth date, using interval year, start date, end date as current date, and alias as age.
Learn to convert strings to dates in SQL Server, build dates from parts, and extract year, month, and day using format and other date functions.
If you are a student or working professional, join me in this engaging beginner course on SQL Queries. This course will teach you how to write SQL Queries for effortless data retrieval with a minimal learning curve.
As of October 2023, I have provided in-person training to over 3,000 professionals, covering skills such as office productivity, programming, databases, analytics, and cloud computing, which enables rapid integration of newfound skill sets.
Course Curriculum
Basic SELECT Statement
Scalar Functions
Aggregates
GROUP BY and HAVING Clause
Comparison and Logical Operators
Table Relationships with JOINS
Sub Queries
Case Switch
SQL Views
CREATE Table
INSERT, UPDATE and DELETE Rows
What this course contains
11 Sections with Easy-to-follow instructional videos
2 Quizzes
Software and Credentials Required
You can install SQL Server Basic along with SQL Server Management Studio.
Alternatively, if you cannot install SQL Server, you may utilize the website SQLiteonline to execute the SQL queries relevant to this course.
Intended Course Outcome
Data Retrieval: Mastering SQL SELECT queries allows learners to efficiently access specific data from one or multiple database tables, ensuring quick and accurate information retrieval.
Data Filtering: Users can employ filtering conditions in SQL SELECT queries using the WHERE clause, enabling data extraction that meets particular criteria, such as date ranges, categories, or values.
Data Sorting: Utilizing SQL SELECT queries, retrieved data can be sorted in ascending or descending order based on one or more columns, simplifying analysis and presentation.
Data Aggregation: Proficiency in SQL SELECT queries empowers users to perform calculations and use aggregate functions (e.g., SUM, AVG, COUNT) on selected data, offering valuable insights and information summaries.
Data Joining: By mastering SQL JOIN clauses, learners can merge data from multiple related tables, promoting extensive data analysis and reporting.