Oracle

#include   #include   "OCILIB.HPP" Using namespace std;using namespace  ocilib; #pragma  comment (lib, "Ociliba.lib") #pragma  comment (lib, "Ocilibw.lib") Int main () {    try   {                int ncout = 0, iin = 11;         string sout,sin = 

Rounding (rounding down):Select Floor (5.534) from dual;Select Trunc (5.534) from dual;Both of the above can be rounded down to the number 5.534, and the result is 5.If you want to take the whole up and get the result of 6, you should use CeilSelect

Data dictionary and Data dictionary viewA data dictionary is a set of system tables created and maintained by an Oracle server. Sys user owns all the data dictionary tables. the Oracle Server operates the base table of the data dictionary in the

Some time ago received a response from the Shenzhen colleague, there is an Oracle cluster load is too high, in order to troubleshoot the problem, the system has restarted, but after the system restarts, 6 of the quorum disk is lost.To find out why,

1, date comparison is accurate to day, you can use TRUNC (sysdate, ' dd ') function.function support formats are: YYYY MM DD hh MiYou can use Select TRUNC (sysdate, ' yyyy ') from the dual test to see"Back": Date select Sysdate from dual--dateSelect

with the constant change of learning knowledge, in order to use a variety of learning needs, the contact of different data processing database is also many for SQL is full of emotion, because the. NET system is to borrow SQL to store our data, and

Dual is a virtual table that makes up the syntax rules for SELECT, and Oracle guarantees that there will always be only one record in dual. We can use it to do a lot of things, as follows:1. To view the current user, you can execute the following

-- PackageCREATE OR REPLACEPackage test_141213 isTYPE type_ref isRecord (enameVARCHAR2( -), Work_cityVARCHAR2( -), SAL Number(Ten)); TYPE T_type_ref is TABLE ofType_ref; FUNCTIONRetrieve (V_namevarchar2)RETURNt_type_ref

The When clause describes the triggering constraint condition. When condition is a logical expression, it must contain a correlation name, not a query statement, or a PL/SQL function. The trigger constraint specified by the When clause can only be

Recently went to the Iron Academy interview, the project leader asked me this question: what is the difference between SQL Server and Oracle? From entering the software industry, from the beginning of the code of CS to the code of the BS is SQL

Odp.net access to the Oracle databaseTo use Oracle Data Provider for. NET (odp.net),You must first install odp.net or ODAC (Oracle Data Access components)(ODAC contains odp.net this component)It's a good idea to install odt.net, so it's a lot easier

Oracle Flashback Technologies-Flash back queryView the modified record of a row of data in a table#创建一个表, and insert and modify dataSql> CREATE TABLE Y3 (IDint, Name VARCHAR2 ( -)); Table created. SQL> INSERT into Y3 values (1,'Wahaha');1row created.

To query for wait events in the database:SET Lines 100SET pages 10000COLUMN wait_class Format A12COLUMN Event Format A30COLUMN total_waits Format 999999COLUMN total_us Format 999999999COLUMN pct_time Format 99.99COLUMN avg_us Format 999999.99SET

Beginner Oracle the students may be in Linux under Use SecureCRT to connect to the server, using the Sqlplus It is not possible to execute the command as entered before the call. the same problem must have been met by the seniors, so it Google a

1. Some common operators operator meaning = Equals <>,! =, ~=, ^= Not equal to Less than > Greater than Less than or equal to

Public database link Dblink_wzgtams CONNECT to Wzgtams identified by Wzgtamsusing' (DESCRIPTION = = 192.168. 11.112 1521 ))))) (= = orcl11g)= dedicated))) ' ;Next, create a simple query validation effectSelect from

From me Oracle Latest SQL Recall Walkthrough 11 blog post http://blog.csdn.net/luozhonghua2014/article/details/45729669 Just re-publish once, is to extract experience, so that we can find a solution --------Modify the field type of the

CREATE table Computers (Comno number (4) constraint Pk_comp primary key, Compmodel VARCHAR2 (+) constraint Unique_comp Unique, Buytime date, price number (12,2) constraint ch_price check (price>0 and priceOracle Graceful for loop inserts in loop

On-site newspaper network company database is not connected, first check the next database processes=1500,session=2200. I think it's very big. This database is not used by a few people.See the session in V$session most of which machine initiated,

RAC on windows:oracle Grid Infrastructure Install or Upgrade fails with Error INS-20802 if Microsoft WMI Service is D Isabled (document ID 1641356.1)pplies to:Oracle Database-standard edition-version 11.2.0.2 and laterinformation in this document