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.

1734

what is a user-defined lock?

1070

What are the steps you will take to improve performance of a poor performing query?

2850

what are the performance views in an oracle rac environment?

1056

can u plz tell me what r the mandatory skills for getting job as a sql dba......plz send me all details thank you my id :k.mohann.mohan@gmail.com

1763

Where would you look for errors from the database engine?

2858

what is asm?

1057

how does an oracle clusterware manage crs resources?

1092

What are the different types of database compression introduced in sql server 2008? : sql server DBA

1108

You create a private database link and upon connection, fails with: ORA-2085: connects to . What is the problem? How would you go about resolving this error?

1985

how can a session indicate its interest in receiving alerts?

1046

how can you create a user-defined lock?

1022

What are the recovery models for a database? : sql server DBA

1132

Assuming today is Monday, how would you use the DBMS_JOB package to schedule the execution of a given procedure owned by SCOTT to start Wednesday at 9AM and to run subsequently every other day at 2AM.

2158

What are the new features in sql server 2005 when compared to sql server 2000? : sql server DBA

1115