Which of the following types of tables constraints will prevent the entry of duplicate rows ?
1). Primary key
2). Unique
3). Null
4). Foreign key
1. _________is another tools to describe the way to arrive at a solution.
2. What is the default file name for the word document
4. एक्सेल में सेल की पहचान निम्न में से कौन करता है ?
6. A directory within a directory is called?????????..
8. Connection or link to other documents or Web Pages that contain related information is called -
9. An attribute that uniquely identifies the rows of a table is known as the key