When i am connect database through toad,one error occured. ORA-12514: TNS:listener does not currently know of service requested in connect descriptor. plz help me thanks advance.............

2857

ORA-26027: unique index string.string partition string initially in unusable state

6788

NZE-28868: Peer certificate chain check failed.

2861

ORA-26030: index string.string had string partitions made unusable due to:

1986

ORA-26032: index string.string loading aborted after string keys

2175

if the lengths of two wires are same and the area of cross sections is 4:7 then what will be the ratio of current passing through these wires

2751

invalid quantity specification negative quantity are not allowed for this item please check this item definition quantity

3435

NZE-28890: Entrust Login Failed

1918

ORA-26095: unprocessed stream data exists

3635

IMG-02003: 2FF03 - incorrect color histogram feature specification

1760

IMP-00060: Warning: Skipping table "string"."string" because object type "string"."string" does not exist or has different identifier

3222

ORA-26076: cannot set or reset value after direct path structure is allocated

2029

IMP-00096: Warning: Skipping table "string"."string" because type synonym "string"."string" cannot be created

1663

IMP-00064: Definition of LOB was truncated by export

6465

ORA-16626: failed to enable specified object

2272