创建测试表,来测试看看测试结果: create table test(name string,pwd string,createdate string)row format delimited fields terminated by ','; 第一步:使用insert into 插入数据到表中: insert into test(name,pwd,createdate)values('name1','pwd1','2017-06-20 14:14:09'); insert into test(
Sqlite执行insert or ignore 或insert or replace语句. ,); ,); 上面的第一条语句是每次执行时,如果不存在,则添加,如果存在,则更新. 上面的第二条语句是每次执行时,如果不存在,则添加,如果存在,则不操作. 在MSSQL中,你可以使用诸如: IF NOT EXISTS(SELECT * FROM Book WHERE ….) THEN INSERT INTO ... ELSE UPDATE SET ...
# 故障描述: hive > , ) as uuid, count(distinct(request_body["uuid"])) as count from log_bftv_api where year= and month= and day= and request_body[ group by order by uuid; # hive 执行该HQL语句时报错信息如下:( 数据量小的时候没有问题 ) # 报错信息: MapReduce Total cumulative C
Hive执行count函数失败 1.现象: 0: jdbc:hive2://192.168.137.12:10000> select count(*) from emp; INFO : Number of reduce tasks determined at compile time: 1 INFO : In order to change the average load for a reducer (in bytes): INFO : set hive.exec.reducers.bytes