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Union combines and removes duplicates, Union All combines without removing duplicates.
Union is used to combine the result sets of two or more SELECT statements and remove duplicates.
Union All is used to combine the result sets of two or more SELECT statements without removing duplicates.
Union is slower than Union All because it has to remove duplicates.
Use Union when you want to combine and remove duplicates, use Union...
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posted on 19 Jun 2017
I appeared for an interview before Jun 2016.
posted on 11 Dec 2024
I applied via Referral and was interviewed before Dec 2023. There were 2 interview rounds.
Ten essential commands in Linux for Application Support Engineers
ls - list directory contents
cd - change directory
pwd - print working directory
cp - copy files and directories
mv - move/rename files and directories
rm - remove files and directories
grep - search text patterns
chmod - change file permissions
ps - display information about running processes
top - display and update sorted information about processes
Yes, I am willing to relocate to the office location.
I am open to relocating for the right opportunity.
I understand the importance of being present in the office for effective communication and collaboration.
I have relocated for previous job opportunities and have had positive experiences.
I am excited about the prospect of working in a new location and embracing new challenges.
posted on 22 Mar 2024
I appeared for an interview before Mar 2023.
I appeared for an interview before Jun 2021.
Answers to Linux-related questions for Application Support Engineer role
Heap dump files can be found using the jmap command
The superuser has complete control over the system and can perform any action
chmod command can be used to modify file permissions
Commands like df, du, and ls can be used to check disk usage
GREP command is used to search for a specific pattern in a file or output
I applied via Campus Placement and was interviewed before Apr 2020. There were 5 interview rounds.
I appeared for an interview in Jan 2024.
I applied via LinkedIn and was interviewed in Jul 2024. There were 2 interview rounds.
I have 5 years of experience working as a software engineer in various industries.
Developed web applications using Java, Spring, and AngularJS
Led a team of developers in a successful project delivery
Implemented CI/CD pipelines to automate software deployment
Worked on improving system performance and scalability
I applied via Referral and was interviewed before Aug 2021. There were 4 interview rounds.
Test duration - 1.5 Hrs
Topics - DB2, CLLE, RPGLE, SQLRPGLE
Platform - IBMi
based on 1 interview
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