Newbie Bar Chart question

🎈 Using Streamlit
1

Summary

I want to do a simple POC for my team with a bar chart. I can write my SQL results to a table, but I want to see them in a Bar Chart but it displays nothing because of my bad syntax.

Code snippet:

st.write(SQL_Query)
df = pd.DataFrame(SQL_Query , columns=['reg','created_at'])
st.bar_chart(df, x='reg', y='created_at')

The table from st.write shows exactly what I want, only those 2 columns. The bar chart shows nothing.
Google has not been my friend! But I am sure this community can point me in the right direction!
Thanks!

2

Unfortunately we don’t know what SQL_Query is so I don’t think we can tell what is going wrong.

3

SQL_Query:
select sum(registrant_id) as reg, created_at::date from domo_dev.lk_training.registrants group by created_at::date order by 2 limit 100’

As mentioned above, ‘st.write(SQL_Query)’ displays the results as a table
first column looks like a row number, second is ‘reg’ and third is that created at date.

Sorry for not including the SQL the first time around!

4

If you add st.dataframe(df) below, does that show you the same as st.table(SQL_Query) ?

5

When I add ‘st.dataframe(df)’ I get a table filled with ‘None’ instead of the query results!

6

My guess is that those column names are not recognized. What do you get when you build the dataframe just as df = pd.DataFrame(SQL_Query) ? Does st.dataframe(df) shows a non-empty table that way?

7

Perhaps you should be using pd.read_sql_query instead.

8

When I try ‘df = pd.DataFrame(SQL_Query)’, then I see the correct results in my table.
Then I get this error:
streamlit.errors.StreamlitAPIException: reg (x parameter) was not found in the data columns or keys

UPDATE - I needed to capitalize the column names to match the table!
It works, thank you for the assistance !!!

9

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