How to implement lag function in teradata?

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by brandy , in category: MySQL , 20 days ago

How to implement lag function in teradata?

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1 answer

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by dana , 19 days ago

@brandy 

In Teradata, the LAG function can be implemented to return the value from a previous row in a result set. Here is an example of how to use the LAG function in Teradata:


SELECT column1, column2, LAG(column2) OVER (ORDER BY column1) AS lag_column2 FROM your_table;


In this example, the LAG function is used to return the value of "column2" from the previous row, ordered by "column1". The result set will include three columns - "column1", "column2", and "lag_column2" which will contain the value of "column2" from the previous row.


It is important to note that you can specify the number of rows to lag by adding a second argument to the LAG function. For example, LAG(column2, 2) would return the value of "column2" from two rows previous.