Inline, double quotes:
"[STLMNT_CRNCY]=\"EUR\" "
Variable, double quotes:
expr = "[STLMNT_CRNCY]="EUR"" (variable, so exclude the outer quotes)
Inline, single quotes:
'[STLMNT_CRNCY]=\'EUR\''
Variable, single quotes:
expr = "[STLMNT_CRNCY]='EUR' " (variable, so exclude the outer quotes)