Oracle 1Z0-116 case studies

Oracle 1Z0-116 · Put your knowledge to work in context.

Oracle Database 12c: SQL Fundamentals (exam code 1Z0-116) is an entry-level Oracle certification exam that tests whether you can read and write SQL against an Oracle database: querying one or more tables, filtering and sorting rows, applying single-row and group functions, converting data types, writing conditional logic, joining tables, using subqueries and set operators, and changing data and schema objects with DML and DDL. It suits people starting a database career - developers, report writers, QA and support staff, students - and anyone who wants a verifiable checkpoint on SQL skills before moving on to administration or PL/SQL. The Oracle 1Z0-116 case studies are 5 cases and about 3,807 words.

Commission Averages That Ignore Half the Department

Meridian Retail's HR team runs a monthly commission report on an EMPLOYEES table with 240 rows across 14 departments. Only 46 employees have a non-null COMMISSION PCT; the rest are salaried and earn no commission.

731 words, about 4 min 2

The Outer Join That Filters Itself Back to an Inner Join

Harbor Freight Logistics has 500 active customers and 12,400 orders; 37 customers have never placed an order and 420 customers currently have no open orders. The service team needs every customer with open order details, including customers with none.

783 words, about 4 min 3

NOT IN, NULLs, and the Scalar Subquery That Returns Too Much

Atlas Support has 1,200 employees. HR analytics maintains BONUS ELIGIBLE(EMPLOYEE ID NUMBER).

758 words, about 4 min 4

Reconciling Two Customer Extracts with UNION and MINUS

Two systems feed a customer master. LEGACY CUSTOMERS has 18,420 rows; NEW CUSTOMERS has 18,395.

761 words, about 4 min 5

The DELETE That Vanished When DDL Committed It

Orion Distribution's SALES table has 42 million rows, is partitioned by SALE MONTH, and has a global index on SALE DATE. At 02:10 a batch developer runs DELETE FROM sales WHERE sale date < DATE '2024-01-01'; it affects 8.2 million rows and is not committed.

774 words, about 4 min