SQL Error: ORA-00913: too many values

You should specify column names as below. It’s good practice and probably solve your problem EDIT: As you said employees has 112 columns (sic!) try to run below select to compare both tables’ columns and than you should upgrade your tables to have the same structure.

Oracle startup not possible – ORA-00845: MEMORY_TARGET not supported on this system – but memory size seems to be fine

You might be using Automatic Memory Management (AMM). AMM uses two initialization parameters: MEMORY_TARGET MEMORY_MAX_TARGET The shared memory file system should have enough space to accommodate the MEMORY_TARGET and MEMORY_MAX_TARGET values. To verify: In UNIX/Linux, you will have to set the shared memory file system accordingly. Verify: Set: For example,

ORA-12899: value too large for column

have a look into this blog, the problem resolved for me by changing the column datatype from varchar(100) to varchar(100 char). in my case the data contains some umlaut characters. http://gerardnico.com/wiki/database/oracle/byte_or_character

No more data to read from socket error

For errors like this you should involve oracle support. Unfortunately you do not mention what oracle release you are using. The error can be related to optimizer bind peeking. Depending on the oracle version different workarounds apply. You have two ways to address this: upgrade to 11.2 set oracle parameter _optim_peek_user_binds = false Of course underscore parameters … Read more

Oracle client ORA-12541: TNS:no listener

You need to set oracle to listen on all ip addresses (by default, it listens only to localhost connections.) Step 1 – Edit listener.ora This file is located in: Windows: %ORACLE_HOME%\network\admin\listener.ora. Linux: $ORACLE_HOME/network/admin/listener.ora Replace localhost with 0.0.0.0 Step 2 – Restart Oracle services Windows: WinKey + rservices.msc Linux (CentOs):sudo systemctl restart oracle-xe