TOAD gives "ORA-00942: table or view does not exist" when updating mixed case tables or columns. For update I do not write any queries, I am trying to update data on grid (data tab). For upper case tables and columns it updates sucessfully. For some reason TOAD generates query without double quotations. Are there any workarounds for this issue?
There is an option in TOAD to double-quote object names. Go into the View menu, choose TOAD Options, select the Oracle/General entry, and change the Double Quote Object Names to "All".
来源：https://stackoverflow.com/questions/9481922/ora-00942-table-or-view-does-not-exist-for-mixed-case-table-and-columns