SELECT
    X.*
FROM (
    SELECT
        T.ID,
        V.TABELA_ID,
        T.ARQUIVO,
        V.TABELA,
        T.DATAHORA,
        CASE
            WHEN T.TAMANHO > 0 THEN T.TAMANHO / 1024 / 1024
            WHEN OCTET_LENGTH(T.CONTEUDO) > 0 THEN CAST(OCTET_LENGTH(T.CONTEUDO) / 1048576.0 AS DECIMAL(15, 4))
            ELSE NULL
        END AS TAM_BLOB_MB
    FROM TBARQUIVO T
    JOIN TBVINCULO V ON V.ARQUIVO_ID = T.ID
    WHERE V.TABELA = 'TBUSUARIO'
) X
WHERE X.TAM_BLOB_MB >= 2.5 OR X.TAM_BLOB_MB IS NULL
ORDER BY TAM_BLOB_MB;