我有2张桌子 (SPEEDTEST_D TABLE和LTE_GROUPLIST TABLE)中,我使用左连接插入到表(LTE_ATHOME_APN_B TABLE)中,但是执行起来耗时太长。如何最小化插入查询的执行时间?
这是我的sql查询:
INSERT INTO LTE_ATHOME_APN_B (IMSI,Cust_Acc_No,PLAN,PEAK_THROUGHPUT_RECEIVED,
PEAK_THROUGHPUT_SENT,INTERNET_LATENCY,RAN_LATENCY,START_TIME,APN_SERVICE)
SELECT s.IMSI,Cust_Acc_No,PLAN,PEAK_THROUGHPUT_RECEIVED,PEAK_THROUGHPUT_SENT,
INTERNET_LATENCY,RAN_LATENCY,START_TIME,APN_SERVICE
FROM SPEEDTEST_D s
LEFT JOIN LTE_GROUP b ON s.IMSI = b.IMSI
WHERE START_TIME >= '2020-09-01' and APN_SERVICE = 'LTE ATHOME APN'