what is joins with example, what is functions and there types. what are different constraints. difference between sql and plsql.
Sql Developer Interview Questions
Sql Developer Interview Questions
SQL stands for Structured Query Language, and SQL developers create SQL databases and the applications that work with them. They often use design tables and storing procedures for stability, reliability, and performance. In an SQL developer interview, employers often ask questions about your programming knowledge and problem-solving skills.
Top SQL Developer Interview Questions & How to Answer
Question 1
Question #1: What are the types of keys in SQL, and when would you use them?
How to answer
How to answer: This question lets you demonstrate your knowledge of SQL. Discuss the most common types of SQL keys, and talk about how they can identify rows and columns in tables. Keys work as unique identifiers, allowing users to retrieve data easily.
Question 2
Question #2: What are the types of normalization available in SQL, and how do you use them?
How to answer
How to answer: People use SQL normalization to organize data and reduce redundancies. You can demonstrate your experience by discussing the normalization methods you use most. For example, many developers divide a large table into several smaller ones for easier readability.
Question 3
Question #3: What programming languages are you familiar with?
How to answer
How to answer: Many SQL developers also use JavaScript, HTML, Python, PL/SQL, and other languages. Mention the languages you know and how you used them at your previous job. Also, tell the interviewer about any programming certifications you received.
2,209 sql developer interview questions shared by candidates
finding number from string
Beyond that, he says, stay focused and interested. “It’s not just the questions, it’s how you ask and how you stay engaged as they answer that matters.”
1. What is coalesce function. 2. Different types of joins .
You manage a retail database that includes Customers, Orders, and OrderDetails tables. Question: Find the top 5 customers who have spent the most on orders in the last year. Details Columns: Customers: CustomerID, CustomerName Orders: OrderID, CustomerID, OrderDate OrderDetails: OrderID, ProductID, Quantity, Price
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sql joins, constraints, normalization etc
delete drop truncate
Difference between drop delete and truncate
Mainly focuses on technical questions like triggers, indexes, cursor, tables , views....
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