SQL query using the Label

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Tamilselvan asked May 27 2024 at 11:37 AM Tamilselvan commented May 28 2024 at 7:52 AM

SQL query using the Label

I am trying to query a GlobalTable1 using SQL, but the column name is present in token.col in the token, how to access the token.col value in the sql query

Software Version:

FlexSim 23.1.1

sql query

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Answer 1 · 2024-05-27T11:46:22Z

Felix Möhlmann answered May 27 2024 at 11:46 AM Tamilselvan commented May 28 2024 at 7:52 AM

Concatenate the label value and the query string.

"SELECT [" + token.col + "] FROM tableName WHERE..."

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Tamilselvan commented · May 28 2024 at 6:11 AM

Yeah it working fine Thanks for the Answer, Now, I just need to Query two column in WHERE which matches the value, can you please help out in this, i am attaching the file with thisFetch_Table_using_Token_and_SQL.fsm

0 ·

fetch-table-using-token-and-sql.fsm (30.1 KiB)

Felix Möhlmann Tamilselvan commented · May 28 2024 at 7:25 AM

- The label on the token is called "Name", not "Col"

- When comparing a column to a string value, the string needs to be enclosed in single quotation marks within the query (WHERE [Name] == 'A'), so you need to add those to the query string in front of and after the label value.

- You need to convert the number value from "token.Num" to a string before you can insert it into the query like this (string.fromNum(token.Num))

- You only write WHERE once, then write multiple checks separated by AND or OR

Table result = Table.query("SELECT * FROM Test1 \
    WHERE [Name] = '"+token.Name+"' AND [Num] = "+string.fromNum(token.Num)+"");

With all that said, values that you want to compare columns to can more easily be passed in via the $-syntax. Inserting the label directly into the string is only needed if it represents a column name or SQL clause.

Table result = Table.query("SELECT * FROM Test1 WHERE [Name] = $1 AND [Num] = $2", token.Name, token.Num);

When the query is run, $1 will be replaced by the first value that is passed in after the query, $2 by the second and so on.

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Tamilselvan Felix Möhlmann commented · May 28 2024 at 7:52 AM

Thanks for the Answer

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Answer 2 · 2024-05-27T11:54:20Z

Tamilselvan answered May 27 2024 at 11:54 AM Felix Möhlmann commented May 27 2024 at 12:37 PM

Can you please help me out with the example

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