duplicate

write a program to input a word from the user and remove the duplicate characters present in it.

postgres duplicate database in same server while other session is using source database

error: duplicate key value violates unique constraint statuslogs_pkey detail: key (id)=(1621) already exists.

java.lang.RuntimeException: Duplicate class com.google.common.util.concurrent.ListenableFuture found in modules guava-20.0.jar (com.google.guava:guava:20.0) and listenablefuture-1.0.jar (com.google.guava:listenablefuture:1.0)

error cs0579 duplicate 'global::system.runtime.versioning.targetframeworkattribute' attribute myuiapp d:\myuiapp\obj\debug\netcoreapp3.1\.netcoreapp,version=v3.1.assemblyattributes.cs 4 active

there are multiple records in a table and some are duplicates. which command will fetch only one copy of the duplicate records? pick one option select distinct select unique select different all of the above