SQL data query optimization select & nbsp;. id, rkno,. packageno & nbsp; as & nbsp; packageno, cust_no, lotno, count (*) & nbsp; as & nbsp; count & nbsp; from & nbsp; 'rk _ record '& nbsp; as & nbsp; a & nbsp; right & nbsp; join & nbsp;'s SQL data query optimization
Select. id, rkno,. packageno as packageno, cust_no, lotno, count (*) as count from 'rk _ record 'as a right join 'sys _ barcode_1d_y' as B on. packageno = B. packageno where rkno = '000000' group by packageno, lotno order by packageno, lotno asc
Rkno and packageno contain indexes.
The current query requires more than 4000 ms. Is there any way to optimize this SQL statement?
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------ Solution --------------------
Table B has no index used
Try to set a. packageno = B. packageno
Writing B. packageno = a. packageno
------ Solution --------------------
No index is used for table B fields. check whether the index is created for the joined fields in Table B.
