Hamidreza questions

Hamidreza answers

• Select greatest duplicate and unique row
• Auto id for select statements in Oracle
• Replace NOT IN with LEFT JOIN in SQL statement
• PL/SQL Developer doesn't show "ő" character
• Declare a variable in Oracle SQL to use in a query
• SQL Server , split a time duration row by 24 hour period
• Underscore is not working in oracle like clause
• Explain the Behavior of DISTINCT COUNT(*)