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Data Warehouse Usage

for a

Study Unit Team –

What the “DWH” can do for you

Rick Bell / Nate Booth / Sandy Williamson2/15/01

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• Data Warehouse Team

• What’s in the Data Warehouse

• Discoverer Software

Features/Queries

• Miscellaneous

Session Overview

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NAWQA Data Warehouse Team

• Sandy Williamson – Tacoma

• Nate Booth – Madison• Bill Selbig – Madison• (Harry House – Madison)

• Rick Bell – Little Rock

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Types of Data in the Data Warehouse

• Chemical groups

– nutrients

– major elements

– trace metals

– pesticides

– volatile/semi-volatile organic compounds

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Types of Data in the Data Warehouse—cont.

• Daily streamflow values • Network and site data

• Stream habitat and community data

• GIS-based ancillary data

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Discoverer Features

• Integrated data (chemical, biological,

network, GIS)

• Pick lists for valid values

• Annotate queries

• Export to popular data formats

• Reusable/shareable queries

• Scheduler (background)

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Data Warehouse/Discoverer Features—cont.

• Excel-like Formatting, Tables,

Cross-Tabs

• Filters, Sorts, Totals, Percentages

• Roll-Up and Drill-Down

• Simple Graphs

• Ad Hoc / Exploratory Data Analysis

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Components of a Discoverer Query

• Select

-display (table type)

-data items

-layout

-conditions (filters)

-sorts, calculations

• Run query

• Modify as needed

Create Query / Select Display

#9

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Select Data Items—Primary Folders

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—

Ancillary Folders

Items Selected

#12

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Items Selected—cont.

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Arrange the layout

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Conditions

#16

New Condition

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Choose Value(s) for Item

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Wildcard Matches

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Conditions for Query

we’ll be right back …

Query Output

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Modify the Query

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Add new items

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Output with new items

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Table Crosstab

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Arrange Layout of Crosstab

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Crosstab Output

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Pivot Example

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Pivot Example—cont.

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Pivot Example—cont.

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Menu Review

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Schedule a Query

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Select Options for Scheduler

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Edit Menu

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Activate “Page Items”

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Display with Page Item

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Display with a Different Page Option

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Display with a New Page Item

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Edit Title

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Choose Items for Title

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Display with Title

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Drill

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Select an Item for a Drill

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Drill Output

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Drill Output—cont.

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Drill Output—cont.

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Display Data “Exceptions”

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Choose Items for Exception Display

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Select “Exception” Criteria

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Exception Output

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Tools Menu

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Totals

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Create a New Total

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Create a New Total—cont.

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Totals Output

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Calculations

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Define a Calculation

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Calculation Output

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“Parameters”

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Parameter Form for Users

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Options

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Query Governor Settings

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Crosstab Settings

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“Outline” Style

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Graphs

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Types of Graphs

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Types of Graphs—cont.

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Excel Toolbar

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Export to Excel

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Health Criteria

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Health Criteria—cont.

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Filter: Values > Health Criteria

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Condition for Value > Health Std

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Regular vs. Replicate Samples

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Atrazine vs. Well Depth

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Sub-query, part 1

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Sub-query, part 2

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Sub-query, part 3

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Map Items

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Map Items—cont.

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Tiger Map

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Topo Map

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Miscellaneous• Data Warehouse Homepage

http://infotrek.er.usgs.gov/wdbctx/nawqa_www/nawqa_www.home

• Public version of Data Warehouse

http://infotrek.er.usgs.gov/wdbctx/nawqa/nawqa.wwv_main.gohome

• Discoverer 4i (web version)

• Sample queries --- public directory

• Web page with ppt presentation slides http://ar.water.usgs.gov/nawqa/national.meeting/nat-meeting.ppt

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Data Warehouse Page

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Data Warehouse---Public Version

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Accessing “Common Area” Queries

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Some “Common Area” Queries