I have query to load 1.5 billion records and I want to improve execution time 

```
SELECT TOP (20) a.code AS No_, 
                lastyear =
(
    SELECT SUM(c.[Sales Amount (Actual)])
    FROM [Uneek Clothing Company Ltd$Value Entry] c
    WHERE c.[Source Type] = 1
          AND c.[Global Dimension 1 Code] = a.Code
          AND c.[Source No_] = 'WOR07'
          AND c.[Posting Date] BETWEEN '01/01/2018' AND '7/16/2018'
), 
                CurrentYear =
(
    SELECT SUM(c.[Sales Amount (Actual)])
    FROM [Uneek Clothing Company Ltd$Value Entry] c
    WHERE c.[Source Type] = 1
          AND c.[Global Dimension 1 Code] = a.Code
          AND c.[Source No_] = 'WOR07'
          AND c.[Posting Date] BETWEEN '01/01/2019' AND '7/16/2019'
)
FROM [Uneek Clothing Company Ltd$Item Category] a
ORDER BY CurrentYear DESC;

```