This SQL tutorial for beginners will show you the using of literal string & quote operator
If you want SQL certified you can use these tutorials.
Other tutorials:
https://youtu.be/Y9qpuKPkYPE
https://youtu.be/4mVRA7Bl_00
https://youtu.be/Gn8y6zsCoLQ
https://youtu.be/UENDBv8PLbk
https://youtu.be/gpVjyubjE0I
https://youtu.be/mC9VL_PZ8Bo
https://youtu.be/3Df7LCx5wKQ
https://youtu.be/O3819K3IYJk