Cassandra – Types of NoSQL Databases

Dear Readers, There are four general types (most common categories) of NoSQL databases. Each of these categories has its own specific attributes and limitations. There is not a single solution which is better than all others; however there are some databases that are better to… Read More

Oracle_Flashback_Important_Queries

Instance Information : set linesize 300 select name||’ – ‘||instance_name||’@’||host_name||’ – ‘||DB_UNIQUE_NAME||’ – ‘||version||’ – ‘||open_mode||’ – ‘||to_char(startup_time,’DD-MON-YYYY HH24:MI:SS’) || ‘ – ‘|| database_role from v$database, v$instance; FRA Usage : set linesize 300 col file_type for a40 select * from V$FLASH_RECOVERY_AREA_USAGE; Check Restore Point :… Read More