when we login sql editor using username and password then it says this error "could not resolve service name" then what can we do at client side.( here thing is tnsnames.ora file is ok till yesterday and worked well, but now it giving error.

1729

how can you communicate with operating system files from oracle?

1051

What is fill factor? : sql server DBA

1250

What is a correlated sub-query? : sql server DBA

1087

What is the difference between dropping a database and taking a database offline? : sql server DBA

1068

In which dictionary table or view would you look to determine at which time a snapshot or MVIEW last successfully refreshed?

2720

What are statistics, under what circumstances they go out of date, how do you update them?

2252

What are the different authentication modes in sql server and how can you change authentication mode? : sql server DBA

1111

Why would you call update statistics? : sql server DBA

991

how can you get actual data change values from previous transactions in oracle?

1089

What are the high-availability solutions in sql server and differentiate them briefly? : sql server DBA

1046

What view(s) do you use to associate a user's SQLPLUS session with his o/s process?

2550

how can you schedule a job in database?

1124

Can you redefine a table online?

1117

What authentication modes does sql server support? : sql server DBA

1217