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Combine search sets created from previous searches. Sets are listed in the Search History table in reverse numerical order - the most recently created set is at the top of the table.
Combine Search Examples
#1 AND #2
#2 OR #3
#1 AND #2 AND #4 AND #6
You can use set numbers to combine two structure searches that retrieved compound records. Similarly, you can combine two structure searches that retrieved reaction records. However, you cannot combine a structure search that retrieved compound records with a structure search that retrieved reaction records.
When you combine a set created from a structure search with a set created from a search for bibliographic information in any database, the result of the set combination will be a number of article records.
For example, in the Search History table below, assume that the 65 reactions in set #2 are from six different articles. Two of these articles are also found in set #1. Set #3 is therefore the number of article records in set #1, plus the number of article records in set #2, minus the duplicates. Set #4 consists of the article records common to both sets #1 and #2.
Also, be aware that if you use AND to combine a set created from a search of the Science Citation Index with a set created from a search of Index Chemicus and/or Current Chemical Reactions, there may be no intersection between the sets if the timespan for each search is Latest 1, 2, or 4 weeks. If you want to limit results to the most recent 1, 2, or 4 weeks, go to the Date & Database Limits page, select all five databases, and then perform the search.
This feature allows you to save your search queries to a search history file, which you can retrieve and open at a later date.
From the Advanced Search page, click the Save History / Create Alert button in the Search History table to go to the Save Search History page where you can save your work to the host server or to your local workstation.
You can save up to 30 search queries from the Search History table. A search history contains the search query and the selected limits (for example, Language=English) for each search query. It does not contain the timespan selection.
Dependent Sets: After you click Delete, the product checks for dependent sets. Selected sets that are not referenced in other sets are deleted. If, however, a set is referenced in a set that is not selected for deletion, the product returns the following error message.
In this instance, the product marks the Delete Sets check box of both the original set marked for deletion and the referenced set. You can either delete both sets or neither set.
Example 1: You create a set combination (set #3) that includes sets #1 and #2. You cannot delete set #1 because set #3 (the referenced set) is dependent on set #1. You can, however, delete both sets #1 and #3.
Example 2: You create a set (set #2) by using the Refine Results option from the Results page. You cannot delete this set because it is dependent upon the original parent set (set #1). You can, however, delete both sets.
About Highlighted Sets
Would you like to see more information about why some sets are highlighted in green or gold in the Set column?
Search History Options
Click here for a list of error messages that may appear on the Search History page.
Do not try to open a saved history file by selecting Open from the File menu on your Web browser or by double-clicking the file from Microsoft® Explorer. These two procedures will not work.
Always open a saved search history by selecting Open Saved History from the Advanced Search or Search History page.
You can also open a saved search history by selecting My Saved Searches from the menu at the top of a page.