I am learning PL/SQL and am using SQL Developer cause I created many users with hr schema. But when a user logs in to SQL Developer give an error like the users is invalid. but When I use the system user, it works perfectly but without hr schema. So: How can I activate the hr schema in system user or
Tag: oracle-sqldeveloper
Insert if not exists Oracle
I need to be able to run an Oracle query which goes to insert a number of rows, but it also checks to see if a primary key exists and if it does, then it skips that insert. Something like: Is this at all possible with Oracle? Bonus points if you can tell me how to do this in PostgreSQL
Oracle SQL escape character (for a ‘&’)
While attempting to execute SQL insert statements using Oracle SQL Developer I keep generating an “Enter substitution value” prompt: I’ve tried escaping the special character in the query using the ” above but I still can’t avoid the ampersand, ‘&’, causing a string substitution. Answer the & is the default value for DEFINE, which allows you to use substitution variables.