Worked technical guide
PL/SQL SELECT INTO: missing rows, duplicate rows and clear failure paths
Explore →SARAVANA KUMAR · TECHNICAL KNOWLEDGE
Oracle SQL & PL/SQL trainer in Chennai & online
Write correct SQL, design clear database APIs and investigate failures using evidence. Learn with Saravana Kumar, technical trainer since 2014. Online across Tamil Nadu; discuss Chennai sessions by enquiry.
A learning path with practical decisions
Begin with tables, keys and basic SELECT statements. Experienced learners can focus on package design, concurrency and performance.
- Joins, nulls, grouping and analytic functions
- Procedures, functions, packages and exception contracts
- Transactions, concurrency and bulk-processing decisions
- Execution-plan interpretation and measured tuning
Practice project to discuss
A customer-reference validation API with explicit missing, duplicate and success outcomes.
This is a proposed learning exercise, not a claim about a client project or student result.
Explore before you enquire
Problems & solutions
Use symptoms, diagnosis steps and a bounded fix.
Explore →Fresher interview preparation
20 concise answers with illustrative scenarios.
Explore →Experienced interview preparation
20 answers focused on tradeoffs, recovery and design.
Explore →Experience and delivery
My technical training journey began in 2014 alongside my professional IT career. My professional background includes 15 years across HCL and Wipro. Subjects taught have evolved over time.
Online mentoring is available to learners across Tamil Nadu. Chennai session arrangements, availability, venue, syllabus, duration and fees are confirmed during enquiry. No permanent training centre address is listed.
View credentials and their verification status · Professional background · Published teaching samples
Discuss your learning goalBefore choosing a course
- Share your experience and target role.
- Ask for prerequisites and an agreed learning outline.
- Discuss the practice tasks, feedback and support included.
- Confirm delivery details before paying or arranging travel.