The use of comparison operators like <,> or = can be done in a subquery. These kinds ofSQL Interview Questionsare a bit difficult to understand and answer accordingly. There are a lot ofSQL Interview Questionsapart from this, which the candidates must practice qualifying for the interview. Fo...
Self join is just like any other join, except that two instances of the same table will be joined in the query. Here is an example: Employees table which contains rows for normal employees as well as managers. So, to find out the managers of all the employees, you need a self join....
6. Can you write a query to find nth highest salary of an employee? 7. Write a query to delete duplicate records from a table. Note: Write queries that suits the below situation. A table is having a unique key and having duplicates records, table is not having a unique and having...
These are just basic questions and you can check the data analyst interview questions here. CLICK HERE TO GET INTERVIEW QUESTIONS FOR TCS… Following are some important Interview Questions for SQL : 1.What is SQL?Where SQL is used? Answer: SQL is Structured Query Language, which is a ...
big query here ) SELECT * FROM YourTable1 WHERE ID IN (SELECT ID FROM YourBigCTE) UNION SELECT * FROM YourTable2 WHERE ID IN (SELECT ID FROM YourBigCTE) Scope is next immediate select command. Can be used multiple times within the same CTE command, even recursively, and will last for...
12.What is Bit-map index?Explain with Example.(80 % Asked in PL SQL Interview Questions) Answer: 1.If Table contains the distinct values which are not more than 20 distinct values then user should go for Bit map indexes. 2.User should avoid the indexing on each and every row and do ...
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However, knowing how to use them when facing a business problem is another pair of shoes. These shoes need a bit of breaking in. The next three interview questions should help you with that. 1. Average Weight of Medal-Winning Judo
Learn how to query your Pandas DataFrames using the standard SQL SELECT statement, seamlessly from within your Python code. SQL SQL Interview Questions for Experienced Professionals - Jan 7, 2022. This article will show you what SQL concepts you should know as an experienced professional. ...
Now it is time to announce the winner and give some feedback about the winning answers to the questions. here. Thanks! Topic: SQL Server Internals Party: Storage, Memory and the Query Life-cycle Abstract: If you’re in the DC/Baltimore area, or just feel like coming to DC to learn ab...