select * from HOUSE_HOUSENUM
where Name ='33_а'
ID Name
6076 33_А
33_а
и 33_A
— это разные вещи. SELECT * FROM HOUSE_HOUSENUM
WHERE UPPER( Name ) = UPPER( '33_а' )
COLLATE
SELECT * FROM HOUSE_HOUSENUM
WHERE Name = '33_а' COLLATE Cyrillic_General_CI_AI