Retrieving Data Using the SQL SELECT

Délka trvání: 3 dny

Pro koho je tento kurz určen:

This training is in fact "Tvorba SQL dotazů", but in English :-). After this training you will be able to retrieve data from your relational database using SQL SELECT statement. In this training we will use Oracle database and tool Oracle SQL Developer, Toad for Oracle or PL/SQL Developer (it's your choice which one you prefer more).

Předpoklady:

• none

Osnova:

• Using your favourite tool (SQL Developer, Toad for Oracle or PL/SQL Developer)
• How to generate and use ER (Entity Relationship) diagram
• Transactions - commit vs rollback
• Using SQL SELECT statement
• SELECT clauses: WHERE, GROUP BY, HAVING, ORDER BY
• Group functions (MIN, MAX, AVG, COUNT, SUM)
• SQL operators  (<, >, =, <>, LIKE, BETWEEN, ...)
• Keyword DISTINCT
• Table DUAL
• Joining tables: INNER JOIN, LEFT JOIN, RIGHT JOIN, ...
• Set operators: UNION, UNION ALL, INTERSECT, MINUS
• Subqueries, keyword WITH
• Indexes, views
• Single-row functions (character, numeric, date, conversion functions, ...)
• Analytic functions