Eclipse is a free open-source Java environment available from http://eclipse.org. Eclipse is a Java program, but it uses a custom user interface toolkit that does not run on all platforms that supports Java 2. Check the web site for supported platforms. Eclipse requires a Java 2 runtime, so you need to install the Java 2 SDK first before installing Eclipse. You can download the SDK from http://java.sun.com/j2se/. more info..
select ColumnName, count(*) from TableName group by ColumnName having count(*) > 1
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