Lead(exp_str,offset,defval)over()--exp_str要取的列--offset取偏移后的第几行数据--defval:没有符合条件的默认值 withx0as(select'1'asaa ,to_date('2018-01-01','yyyy-mm-dd')as日期fromdualunionallselect'2'asaa,to_date('2018-01-15','yyyy-mm-dd')as日期fromdualunionallselect'3'asaa,...
There are 2 types of Cursors used in PL/SQL programming: 1. Implicit Cursors As the name indicates, Implicit cursors are those cursors that are automatically created by Oracle when any DML statements like INSERT, DELETE, UPDATE are executed. When the programmer does not create any cursor, Orac...
And this is why I love doing customer sessions. I haven’t been asked this question, ever. But today, a very fun group in Texas threw it out there. It’s very satisfying as a presenter to not know the answer, but after a few seconds having the tool give you what ...
UsingFlashback Query, you can view data as it was in the past. So to find the delta, compare a table now to how it existed at a known good time in the past. How to compare rows and show the column differences Rows for given keys may exist in both data sets with different values ...
MS sql could have materialized views ,similar with oracle MVs, using indexed views. what is going on ? are they same thing ? Here we go : (1) general demo tables and rows /*** AboutSQLServer.com blog Written by Dmitri Korotkevitch "Indexed views" 2011...
Duplicate some or all of the data in one table under a different table name : Copy Table « Table « Oracle PL / SQL
Nisarg Upadhyay is a SQL Server Database Administrator and Microsoft certified professional who has more than 8 years of experience with SQL Server administration and 2 years with Oracle 10g database administration. He has expertise in database design, performance tuning, backup and recovery...
In 10g, Oracle introduced themodel clause. This enables you to create columns using complex formulas. This gives spreadsheet-like abilities in SQL! You can use it here to do the logic above. To do this, you need to supply three parts for the model. Dimension by states how you're going...
Oracle Database - Enterprise Edition - Version 19.7.0.0.0 and later Information in this document applies to any platform. Symptoms Returning wrong result after upgrade from 11g to 19c: Correct count is 1: SQL> select count(1)... (select 1 ...
Q What are the different elements in Functions points? ✍: Guest A The different elements in function points are as follows: Internal Logical Files (ILF) External Interface File (EIF) Record Element Type (RET) DET (Data element types) File Type Reference (FTR) External Input (EI)...