问题
I'm using OleDBCommand to select some data in an Excel sheet I have. I have One column that has lists of data (column J) and every column after that either (columns K - AG) has a 1 or 0 depending on a relationship. So it's basically a graph plotted with 1 or 0. I want to use a SQL command to select every entry in column J where there is a 1 plotted in a column I choose. For example, say I want to look at the column J to K relationship. Then I would want to pull all data from J where columns J and K have a 1. I am unsure of how to specify columns in SQL. I have currently:
OleDbCommand command = new OleDbCommand("select * from [Master$J0:J20] , connection);
I would need a WHERE clause after that to specify, where K0:K20 = '1' right? Or something like that. I can't get it.
回答1:
Solution: Columns can be referenced by F1, F2, F3...FN. So in my case I would want for example:
SELECT F8 FROM [Sheet1$] WHERE F11 = '1'
来源：https://stackoverflow.com/questions/24294393/sql-oledbcommand-selecting-excel-columns