What SQL query or view will show “dynamic columns”
问题 I have a table of data, and I allow people to add meta data to that table. I give them an interface that allows them to treat it as though they're adding extra columns to the table their data is stored in, but I'm actually storing the data in another table. Data Table DataID Data Meta Table DataID MetaName MetaData So if they wanted a table that stored the data, the date, and a name, then I'd have the data in the data table, and the word "Date" in metaname, and the date in MetaData, and