SQL statements (up to interview the students occupied area)
PL / SQL ( object-oriented )
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development tools:
PL / SQL Developer (in the mainstream of the mainstream)
-->>
1. The third-party developed
2. Run TNS , so the need oracle client support, and the need to configure TNS
3. Pay
PL the Oracle / SQL Developer (garbage in the garbage , java development)
1.oracle company itself
2. very ugly, slow, Caton
3. Run the JDBC (no need to install oracle client)
When you run this program
Automatically read ( environment variables ORACLE_HOME and NLS_LANG)
Read ORACLE_HOME , except to get oracle client support, while also reading ORACLE_HOME following network / admin / tnsnames.ora file to obtain the service name.
If the error ORA-01804, then the PL / SQL Developer also configure
