)BonA.V_MEMBER=B.V_MEMBER ②采用nvl函数selectnvl(A.V_MEMBER,B.V_MEMBER) V_MEMBER,nvl(A.V_Date,B.V_Date) V_Date, nvl(A.V_MOUNT,0)+nvl(B.V_MOUNT,0) Amountfrom(select*fromTEST_AwhereV_DATE=TO_DATE('2020-09-24 00:00:00','YYYY-MM-DD HH24:MI:SS') )AfullJOIN(select*fr...
The NVL function in SQL replaces NULL values with a default. Learn how to use it, understand the syntax, and see how it compares to COALESCE for SQL queries.
Add Time in SQL HH:MM:SS to another HH:MM:SS Adding a column to a large (100 million rows) table with default constraint adding a extra column in a pivot table created uisng T-SQL Pivot Table query Adding a partition scheme to an existing table. Adding a Value to a 'date' Column ...
第二条SQL的过程: 1、中间表 on条件: tab1.size = tab2.size and tab2.name=’AAA’ (条件不为真也会返回左表中的记录) 其实以上结果的关键原因就是left join,right join,full join的特殊性,不管on上的条件是否为真都会返回left或right表中的记录,full则具有left和right的特性的并集。 而inner jion没这...
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