what do these signs mean?

Question

SQL + C#

"LIKE '{0}*'"
' - ?
{} - ?
* - ?

Answer 1

Put this way it is difficult to understand, we should understand the code. To be an interpolated string there should be a $ before the double opening quote, but in braces, if it is a 0 and not an O, it's no good. Probably the string will be fed to something that will replace {0} with something else. If * it is part of the placeholder it is difficult to say so. SQL usually uses% to indicate any sequence of characters.