在Teradata SQL中,当对无界行进行求和时,可以使用GROUP BY子句来实现对特定列进行分组,并对每个组进行求和操作。GROUP BY子句根据指定的列将数据分成多个组,然后对每个组进行聚合操作。 对无界行进行求和时的GROUP BY操作可以用于以下场景: 数据分析:通过对特定列进行分组,可以对数据进行更细粒度的分析,例如按照地区、...
2), "QUANTITY" NUMBER ) insert into TEST8 (ID, ORDERID, PRODUCTID, PRICE, QUANTITY) v...
Union ---保持字段数目相同且对应字段的域兼容 . Union(自动去除重复的记录) union all(保留重复记录) Intersect ---相交操作 Except 、 minus ---排它操作 1. 2. 3. 37.视图 --- 视图定义中不能使用 order by Create view view_name as select * from table_name Replace view view_name(flight_dt,...
Empower everyone across the organization to innovate faster by easily unifying and harmonizing all your data. analytics Activate analytics Transform your data into insights that drive breakthroughs again and again with powerful, integrated AI and cloud analytics. ...
,CASE GROUPING (job_code) WHEN 1 THEN 'All Job Codes' ELSE (COALESCE (job_code,'Null Job Code') ) END AS job_code ,SUM(salary_amount) FROM employee GROUP BY ROLLUP (department_number,job_code) ORDER BY 1,2; 结果如下 Deptno job_code Sum(salary_amount) ...
这些特性在GaussDB(DWS)中不可用,使用UNION ALL操作符可以实现类似的功能。 可以使用extendedGroupByClause参数来配置扩展GROUP BY子句的迁移。 输入:扩展Group By子句,使用CUBE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 SELECT expr1 AS alias1 , expr2 AS alias2 , expr3 AS alias3 , MAX( expr4 )...
17.Group Read Lock Option作用:允许表在被修改的时候做备份操作(原因是此备份操作将数据修改日志一起做备份操作)。 限制条件: ? Rolling archive while you are using a table. ? Must have After-Image Journal defined. ? Only valid for an all-AMPs archive. 操作结果: ? All transactions will be inclu...
Empower everyone across the organization to innovate faster by easily unifying and harmonizing all your data. analytics Activate analytics Transform your data into insights that drive breakthroughs again and again with powerful, integrated AI and cloud analytics. ...
Teradata的集合操作与标准ANSI集合操作的不同之出在于返回结果的重复记录处理上。在ANSI标准中集合操作将重复记录自动剔除,而Teradata增加了ALL关键词,ALL关键词允许保留重复记录。 我们将有关集合操作的一些补充规则列举如下: 1. 在子查询中不能使用集合操作 ...
输入:LIKE ALL/LIKE ANY中以$开头的值 1 2 3 4 5 6 7 8 9 10 11 SELECT * FROM T1 WHERE T1.Event_Dt>=ADD_MONTHS(CAST('${OUT_DATE}' AS DATE FORMAT 'YYYYMMDD')+1,(-1)*CAST(T7.Tm_Range_Month AS INTEGER)) AND T1.Event_Dt<=CAST('${OUT_DATE}' AS DATE FORMAT 'YYYYMMDD'...