I have a sql server table that has 150 columns. I wrote a trigger that sends an email to me telling me about some fields from this table. New Information added or already existing info updates. I only deal with around 15 columns here. I wanted to know, in case of update, what all columns are actually updated. I don't want to write each and every column to see if it is updated. Columns_Updated i don't know the logic behind it. Please suggest. Thanks.
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Hello Scott
I'm shining the batman light for help.
Would you be able to help me on this post. There is a word document that contains my current design.
I would appreciate it very much.
http://www.experts-exchang
wilkersons - sorry to piggyback your post
And you should understand that IF UPDATE() and COLUMNS_UPDATED() do not tell you if the data actually changed. All they tell you was if the column(s) articipated in an UPDATE statement. In order to check to see if the data actually changed you would have to check the value of the column in the Deleted logical table and compare it to the corresponding column in the Inserted logical table.
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by: SireesPosted on 2006-10-19 at 12:20:21ID: 17768793
FROM BOL
COLUMNS_UPDATED())
Tests, in an INSERT or UPDATE trigger only, whether the mentioned column or columns were inserted or updated. COLUMNS_UPDATED returns a varbinary bit pattern that indicates which columns in the table were inserted or updated.
The COLUMNS_UPDATED function returns the bits in order from left to right, with the least significant bit being the leftmost. The leftmost bit represents the first column in the table; the next bit to the right represents the second column, and so on. COLUMNS_UPDATED returns multiple bytes if the table on which the trigger is created contains more than 8 columns, with the least significant byte being the leftmost. COLUMNS_UPDATED will return the TRUE value for all columns in INSERT actions because the columns have either explicit values or implicit (NULL) values inserted.
COLUMNS_UPDATED can be used anywhere inside the body of the trigger.