Select non allocated time slots against an employee from a set of times in SQL

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Hi all,
I have a set of employees and a set of time slots .
An employee can be allocated to any timeslots .What I need is that, if an Employee is allocated in time slots 8:00Am-12:00PM then that Employee should not be available in 08:00AM-10:00AM and 10:00AM-12:00PM slots .Similarly , if the an employee is allocated in 04:00PM-06:00PM then that employee should not be available in any of the timeslots between 04:00PM-06:00PM , but can be available before and after time slots , not in between .
How to do this .Any help will be really appreciated.Thanks in advance.

What I have tried:

Employees

EMP1
EMP2
EMP3
EMP4
EMP5  

Time Slots

08:00AM-10:00AM
10:00AM-12:00PM
04:00PM-06:00PM
08:00AM-12:00PM
02:00PM-06:00PM
08:00AM-04:00PM
09:00AM-01:00PM
08:30AM-01:30PM
12:00PM-04:00PM
2:00PM-3:00PM

Posted 22-Jul-18 9:51am

Member 12926744

Updated 22-Jul-18 18:54pm

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Comments

[no name] 23-Jul-18 4:07am

Why don't you "order" your time slots by start and end times so they can be discussed intelligently. The answer may then even be obvious.

Richard Deeming 23-Jul-18 12:25pm

Show the structure of your tables, including the data types. You currently haven't shown us how an employee as allocated to a time slot.

And I hope those time slots are stored as two time columns, not a combined varchar column!

Member 12926744 24-Jul-18 6:28am

Time columns is stored as two time columns

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