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Using Toad for Data Analysts

Using Toad for Data Analysts. A prettier SQL interface. Step 1: Get to know your data. Excel Workbook titled “CHSI Dataset” Community Health Status Indicators Downloaded from Data.gov DataElementDescription = Data Dictionary DefinedDataValue = Data Code sheet

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Using Toad for Data Analysts

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  1. Using Toad for Data Analysts A prettier SQL interface

  2. Step 1: Get to know your data • Excel Workbook titled “CHSI Dataset” • Community Health Status Indicators • Downloaded from Data.gov • DataElementDescription = Data Dictionary • DefinedDataValue = Data Code sheet • Additional tables provide various health measures, often on the county level

  3. Import Data • Select all data in Workbook, save and close • Navigation Manager  Create new connection  Group: Excel Advanced Uncheck Read-Only & Automatically create ranges  Navigate to CHSI Data.xls  Name: CHSI

  4. Data Browser • Double-click on table DATAELEMENTDESCRIPTION • FilterWhere Clause: Page_Name = ‘Demographics’

  5. SQL Editor • Click Editor • Input: • Select * from DATAELEMENTDESCRIPTION descr where descr.PAGE_NAME = ‘Demographics’ • Don’t forget to name your table by typing in a nickname after full table name. This simplifies query writing

  6. Join tables • Let’s join Demographics to Summary Measures of Health • What are common fields? • State_FIPS_Code • County_FIPS_Code • select demo.CHSI_County_Name, demo.poverty, summ.ALE from DEMOGRAPHICS demo, SUMMARYMEASURESOFHEALTH summ where demo.CHSI_State_Abbr='CA' and summ.State_FIPS_Code=demo.State_FIPS_Code and summ.County_FIPS_Code=demo.County_FIPS_Code • This will tell us percent living below 10th Percentile average life expectancy per county

  7. Grouping Data • What if we want to know poverty rates and average life expectancy by state? • select demo.CHSI_State_Abbr, sum(demo.poverty), avg(summ.ALE) from DEMOGRAPHICS demo, SUMMARYMEASURESOFHEALTH summ where summ.State_FIPS_Code=demo.State_FIPS_Code and summ.County_FIPS_Code=demo.County_FIPS_Code group by demo.CHSI_State_Abbr

  8. Sorting Data • Now let’s sort the states by number in poverty, highest to lowest • You can simply click on output header and sort • Or use the following code: • select * from (select demo.CHSI_State_Abbr, sum(demo.poverty), avg(summ.ALE) from DEMOGRAPHICS demo, SUMMARYMEASURESOFHEALTH summ where summ.State_FIPS_Code=demo.State_FIPS_Code and summ.County_FIPS_Code=demo.County_FIPS_Code group by demo.CHSI_State_Abbr) order by Expr1001 asc

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