ATSDR - Internet HazDat

Agency for Toxic Substances and Disease Registry

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Internet HazDat - Query Help

Leaving a query form blank will return information about all records in a database table. For example, in the Site Activity Query, a blank query form will return more than 4,000 rows of data. Make entries and selections from a form to LIMIT the query to a smaller subset of data. Multiple selections may be made from scrolling selection lists with "Ctrl + Left Click".

—› 5

A entry like this in a data cell indicates a link to related records in another database table. The example above indicates that clicking on the link will return 5 related database records.

View Text or View ToxFAQ Sheet

Entries like these indicate links to related Web documents. Clicking on a link like this will retrieve the Web document.

Descriptions of database fields (columns) can be found in the Internet HazDat Data Dictionary. Definitions of individual columns can also be accessed by clicking on the column header names as they appear in query results tables.