Performance 类T-SQL查询性能+交叉连接

tst总计包含85k条记录，tmprec总计包含255k条记录。上述查询的目的是从tblNewZone获取记录的匹配邮政编码，该邮政编码从匹配的sConsigneePostcodeFirst开始

问题如上所述，执行查询需要7分钟。我在查询中添加了索引，尝试了like查询，尝试了文本搜索索引

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如果我能做些什么来改进查询，请告诉我。

Top 1是不确定的，没有唯一的顺序，因为我看到了几个操作，您希望改进哪一个？

                WITH tst
            AS (
                SELECT nz.sPostcode op
                    ,zp.nZoneCountryID
                    ,zp.sPostcode
                    ,zp.nZoneID
                    ,zp.nInjectionID
                FROM dbo.tblZonePostcode zp
                INNER JOIN tblNewZone nz ON nz.nPostcodeID = zp.NewZoneId
                WHERE CHARINDEX('%', zp.sPostcode) = 1
                    AND zp.sPostcode IS NOT NULL
                    AND isnumeric(zp.sPostcodeRange) = 0
                )
            SELECT *
            INTO #tmptst
            FROM tst;

            CREATE INDEX idx_sPostcode12 ON #tmptst (sPostcode);

            CREATE INDEX idx_x1 ON #tmptst (nZoneCountryID);

            CREATE INDEX idx_x2 ON #tmptst (nInjectionID);

            CREATE INDEX idx_x3 ON #tmptst (nZoneID);

            UPDATE #tmprec
            SET calculatedPostCodeZone = (
                    SELECT TOP 1 zp.op
                    FROM #tmptst zp
                    WHERE zp.nZoneCountryID = CalculatedCountryId
                        AND zp.nInjectionID = CalculatedinjectionPointId
                        AND zp.nZoneID = CalculatedZoneId
                        AND CHARINDEX(zp.sPostcode, sConsigneePostcodeFirst) = 1
                    )
            WHERE CalculatedRateChartGroupID > 0
                AND calculatedRatechartValues IS NULL
                AND calculatedPostCodeZone IS NULL
                AND CalculationStatus IS NULL
                AND 0 < (
                    SELECT count(1)
                    FROM #tmptst
                    );