Even though PostgreSQL has unlimited database size for users, but it has a limit for maximum table size. The maximum table size is set to 32 TB. Note: This is very essential PostgreSQL interview questions. Q13. What are the difference between PostgreSQL and SQL Server? Answer S.noPostgreSQL...
SQL Server Profiler is a tool for monitoring and analyzing SQL Server events. It captures and records data about each event, such as query execution, performance metrics, and errors. It allows database administrators to diagnose performance issues, identify slow-running queries, and audit SQL Serve...
Discover the top Hadoop interview questions and answers to help you prepare for your next big data job interview. From basic concepts to advanced scenarios, this guide covers essential topics and provides insights into the Hadoop ecosystem. Laiba Siddiqui 25 min blog Top 30 SQL Server Interview Q...
Write a SQL query using UNION ALL (not UNION) that uses the WHERE clause to eliminate duplicates. Why might you want to do this? View answer You can avoid duplicates using UNION ALL and still run much faster than UNION DISTINCT (which is actually same as UNION) by running a query like...
A view in Oracle is a virtual table created by a SQL query that selects data from one or more tables. It does not store data itself but displays data from the underlying tables. 12) What is the difference between DELETE and TRUNCATE commands in Oracle?
48. How to use IF THEN ELSE in PROC SQL? PROC SQL; SELECT WEIGHT, CASE WHEN WEIGHT BETWEEN 0 AND 50 THEN ’LOW’ WHEN WEIGHT BETWEEN 51 AND 70 THEN ’MEDIUM’ WHEN WEIGHT BETWEEN 71 AND 100 THEN ’HIGH’ ELSE ’VERY HIGH’
Query structure based on a single endpoint Supports multiple data formats, like JSON, XML, and plain text Supports only XML data format Supports JSON data format It can fetch the response fast Slowest to fetch the relevant response Faster than SOAP and sometimes as fast as REST ...
48. How to use IF THEN ELSE in PROC SQL? PROC SQL; SELECT WEIGHT, CASE WHEN WEIGHT BETWEEN 0 AND 50 THEN ’LOW’ WHEN WEIGHT BETWEEN 51 AND 70 THEN ’MEDIUM’ WHEN WEIGHT BETWEEN 71 AND 100 THEN ’HIGH’ ELSE ’VERY HIGH’
14) What is the difference between function and procedure in SQL? A function returns a single value that, as it were, becomes an element in queries. A procedure sends back some realization of itself in terms of performance and various tasks. ...
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