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)