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55 results
Oracle Database 26ai new feature | Empty String on NULL for JSON Generation Explained In this video, you will learn about ...
9 views
34 min ago
Put new data into a table. In this advanced-level lesson, "INSERT: Adding Rows", you type real queries, see the real results on ...
1 view
18h ago
What actually happens inside an Oracle Database when you INSERT, UPDATE, DELETE, ROLLBACK or execute DDL? Oracle ...
34 views
11h ago
Spot repeated rows and clean them up. In this intermediate-level lesson, "Find and Remove Duplicates", you type real queries, ...
19h ago
Design tables that protect your data. In this advanced-level lesson, "CREATE TABLE and Constraints", you type real queries, see ...
0 views
17h ago
10 query challenges. In this beginner-level lesson, "Beginner Workout: 10 Query Challenges", you type real queries, see the real ...
21h ago
Oracle APEX Developers - Oracle Database Administrators (DBAs) - Oracle APEX Consultants - Enterprise application support ...
27 views
14h ago
0
Slice data in two dimensions. In this beginner-level lesson, "GROUP BY with Multiple Columns", you type real queries, see the ...
Save a query under a name. In this advanced-level lesson, "Views", you type real queries, see the real results on screen, and ...
All changes succeed, or none do. In this advanced-level lesson, "Transactions: COMMIT and ROLLBACK", you type real queries, ...
Summarise data by category. In this beginner-level lesson, "GROUP BY", you type real queries, see the real results on screen, ...
22h ago
Add logic inside your queries. In this beginner-level lesson, "CASE: If-Then-Else in SQL", you type real queries, see the real ...
Walk a tree: boss, reports, reports of reports. In this advanced-level lesson, "Recursive CTEs: Org Charts", you type real queries, ...
2 views
Name a query, then use it. In this advanced-level lesson, "CTEs: The WITH Clause", you type real queries, see the real results on ...
The typical value, beyond the average. In this advanced-level lesson, "Median and Percentiles", you type real queries, see the ...
Pay, grades, tenure and structure. In this advanced-level lesson, "Case Study: HR Analytics", you type real queries, see the real ...
Combine tables on matching keys. In this intermediate-level lesson, "INNER JOIN", you type real queries, see the real results on ...
Stack the results of two queries. In this intermediate-level lesson, "UNION and UNION ALL", you type real queries, see the real ...
COUNT(*), COUNT(col), COUNT(DISTINCT). In this beginner-level lesson, "COUNT in Depth", you type real queries, see the real ...
