oracle12c

问题 First, I execute the following SQL statements. drop table names; drop table ages; create table names (id number, name varchar2(20)); insert into names values (1, 'Harry'); insert into names values (2, 'Sally'); insert into names values (3, 'Barry'); create table ages (id number, age number); insert into ages values (1, 25); insert into ages values (2, 30); insert into ages values (3, 35); select * from names; select * from ages; As a result, the following tables are created. ID NAME ---------

问题 I do have a serious problems with between Oracle DB and ASP.NET MVC: How to use Oracle DB in Visual Studio? My environment is: Oracle DB (12c) Visual Stdio 2015 Windows 10 with VMware Use ASP.net MVC with Entity Framework to connect Oracle DB Data How can I get ASP.NET MVC (WEBAPI) to work properly with Oracle DB (12c)? 回答1: How do I create ASP.NET MVC with oracle DB, and as following step by step can tell you how to deal with this issue. Step1. Download [ODAC] (http://www.oracle.com

问题 In my current project, my DBA suggested to store everything as JSON object in oracle. I don't feel that is the right approach because basically he suggested to use Oracle like MongoDB. Is there any Pros and Cons storing JSON objects in Oracle database as it is RDBMS database. 来源： https://stackoverflow.com/questions/46166362/what-are-pros-and-cons-storing-json-in-oracle

问题 CREATE TYPE nums_list AS TABLE OF NUMBER; What is maximum possible rows count in oracle's nested table ? UPDATE CREATE TYPE nums_list AS TABLE OF NUMBER; CREATE OR REPLACE FUNCTION generate_series(from_n NUMBER, to_n NUMBER) RETURN nums_list AS ret_table nums_list := nums_list(); BEGIN FOR i IN from_n..to_n LOOP ret_table.EXTEND; ret_table(i) := i; END LOOP; RETURN ret_table; END; SELECT count(*) FROM TABLE ( generate_series(1,4555555) ); This gives error: ORA-22813 operand value exceeds

问题 To make a long story short I propose to discuss the code you see below. When running it: Oracle 11 compiler raises "PLS-00306: wrong number or types of arguments tips in call to 'PIPE_TABLE'" "PLS-00642: Local Collection Types Not Allowed in SQL Statement" Oracle 12 compiles the following package with no such warnings, but we have a surprise in runtime when executing the anonymous block as is - everything is fine (we may pipe some rows in the pipe_table function - it doesn't affect) now let's

问题 We recently migrated a customer system to Oracle 12c and to the latest version of our product. This process includes running a number of migration scripts which mostly add or change tables. We noticed that adding a column to a table while also providing a default value, creates an additional hidden column SYS_NC00002$ . You should be able to reproduce this with the following code create table xxx (a integer); alter table xxx add (b integer default 1); select table_name, column_name, data_type

问题 The bounty expires in 2 days . Answers to this question are eligible for a +100 reputation bounty. Pratik Butani is looking for an answer from a reputable source : I didn't found proper driver and documentation too. Help with some example or docs about 12c with Java/Android Since last 3 days I am getting problem with just simple connection of Android - Oracle 12c Database. Recently I have uploaded Android-Oracle-Connection but its for 11g version. I have used ojdbc14.jar I have used following

问题 I am currently working through an example of using the JSON features of Oracle 12c and I am struggling to understand how to use wildcards and ranges with JSON_VALUE. The example I am using is from the January/February 2015 issue of Oracle Magazine and here is the SQL I am stuck on. select json_value(t.trans_msg, '$.CheckDetails[0].CheckNumber'), -- works returns 101 json_value(t.trans_msg, '$.CheckDetails[*].CheckNumber'), -- null returned json_value(t.trans_msg, '$.CheckDetails[0,1]

问题 OracleCommand cmd = new OracleCommand("select * from Test WHERE TestFLAG = 1 or TestFLAGis not null", con); When there is a change at the table, no matter the condition is, my .net project will still receive notification. For second issue, After I receive any notification for 1st time, any changes on the table after that are not being notified. Why? Any solution for my problem? public class MyNotificationSample { static string constr = "your db INFO"; public static bool IsNotified = false;

问题 I'm trying to connect to an Oracle Database on our server from an Excel sheet, but am having trouble understanding why. I currently have both 32-bit and 64-bit Oracle 12c installed in different ORACLE_HOME s and have a 32-bit installation of Excel on my 64-bit computer. I'm trying to connect to an Oracle Database in Excel using the New Query wizard. When I click From Oracle Database I get the following error/message. I can continue with my current provider, but when I actually try to connect