My answers are as follows:
Can we go to same branch ( now SBI Miryalaguda [SBH Miryalaguda before merger ]) and present cheque in the branch for encash?
Ans: Yes, you can.
In cheque is honoured, no cash in account, can the Bank give letter?
Ans: Yes it has to . For any thing get endorsement with the bank in writing.
Details on availing SBI cheque books by March 31
SBI said this week that the cheque books of its erstwhile associate banks and Bharatiya Mahila Bank (BMB) which merged with it will not be valid after March 31. Five erstwhile associate banks - State Bank of Bikaner & Jaipur (SBBJ), State Bank of Mysore (SBM), State Bank of Travancore (SBT), State Bank of Patiala (SBP), State Bank of Hyderabad (SBH)- and BMB merged with SBI with effect from April 2017.