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What is the difference between nvl function, ifnull function, and isnull function?
How to add a column ‘salary’ to a table employee_details?
What is the command used to fetch the first 5 characters of a string?
What is the difference between local variables and global variables?
What are all the different normalization?
What is a field in a database?
Can a table contain multiple primary key’s?
What is the sql case statement?
Explain sql data types?
What is the largest value that can be stored in a byte data field?
What are operators available in sql?
How to fetch values from testtable1 that are not in testtable2 without using not keyword?
What are user defined functions?
What is auto increment in sql?
How to change a value of the field ‘salary’ as 7500 for an employee_name ‘john’ in a table employee_details?
