SQL
I - SQL Overview
- Relational database concepts, specific products
- SQL syntax rules
- Data definition, data manipulation, and data control statements
- Getting acquainted with the course database and editor
II - SQL SELECT statements
- Clauses
- The SELECT clause: columns and aliases, where expressions, order by expressions how null values behave
III - SQL Functions and Expressions
- Eliminating duplicates with DISTINCT arithmetic expressions
- Replacing null values
- Numeric operations, including rounding
- Date and time functions
- Nested table expressions
- Case logic
- Other expressions in specific dbms products
IV - SQL Updating
- The INSERT, UPDATE and DELETE statements
- Column constraints and defaults
- Referential integrity constraints
V - SQL Joins
- Inner joins with original and SQL 92 syntax
- Table aliases
- Left, right and full outer joins, Inner joins
- Self-joins
VI - SQL Sub queries and Unions
- Intersection with IN, and, Between
- Sub queries
- Difference with IS NULL and IS NOT NULL sub queries
- The purpose and usage of UNION and UNIONALL
VII - SQL Summarization
- The column functions MIN, MAX, AVG, SUM and COUNT, UPPER, LENGTH, LOWER
- The GROUP BY and HAVING clauses Grouping in a combination with joining
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