使用连接和 Like 运算符查询速度缓慢

Question

这是我的 SQL 查询：

SELECT B.TransactionId 
FROM BillingInfo B
INNER JOIN OfficeCustomers OC ON B.CustomerId = OC.Id
INNER JOIN CustomerContact CC ON CC.Id = OC.ContactId
WHERE CC.FirstName + ' ' + CC.LastName LIKE '%yog%'
ORDER BY B.TransactionId 
    OFFSET (0) ROWS FETCH NEXT (50) ROWS ONLY

执行计划

此查询大约需要 6 秒才能完成。可以采取哪些措施来提高性能？

Answer 1

这两条评论很准确。

如果可能，请将

LIKE '%yog%

替换为

LIKE 'yog%

。

您还可以尝试以下查询：

WITH contacts AS
(
    SELECT CC.Id
    FROM CustomerContact CC
    WHERE CC.FirstName LIKE '%yog%' OR CC.LastName LIKE '%yog%'
)
SELECT B.TransactionId 
FROM BillingInfo B
    INNER JOIN OfficeCustomers OC ON B.CustomerId = OC.Id
    INNER JOIN contacts CC ON CC.Id = OC.ContactId
ORDER BY B.TransactionId
OFFSET (0) ROWS FETCH NEXT (50) ROWS ONLY;