Did you have any chance to check Viorel's solution?
Step1: Right click the table and select 'Edit Top 200 Rows'.
Step2: Click SQL button in the toolbar to show SQL pane.
Step3: Modify the query code and then click the 'Execute SQL' button
Step4: It'll now allow you to view and edit the display data.
Second Question: If MSSMS is not the best way to edit data in this way, what is?
You might have a try on Visual Studio. I'm not an expert on VS, but I find this thread which might help.
Best regards,
Cosmog Hong
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