Oracle

--minus to go to the difference set, take the first set to have one but the second set does not, and sort by the first fieldSelectT.bumenbm fromT_HQ_BM TminusSelectB.bumenbm fromt_hq_bm2 B--intersect intersection, take two sets of all, and sort by

Program development times wrong: Trigger ' SA. U_USER_INFO_TRG ' is invalid and has not been re-verifiedOpens the definition of the trigger, executes the statement within it, and discovers that the sequence u_user_info_seq is undefined.What is a

1. The most important difference is that the data stored is of different importance.SYS: All Oracle data dictionary base tables and views are stored in the SYS user, these base tables and views are very important to the operation of Oracle, the

In Oracle, table space is the storage concept, the establishment of table space needs to have a corresponding data file, the data file is established directly after the allocation of a certain amount of disk space to it, so that the database storage

Set NON-CDB to read-only mode:$ sqlplus'/as sysdba'SQL>SelectName, Decode (CDB,'YES','multitenant Option enabled','Regular 12c Database:')"multitenant Option", Open_mode, con_id fromv$database; NAME multitenant Option open_mode con_id--------- ------

It is not possible to use DDL statements in Oracle to use stored procedures instead of execution.Oracle stored procedure Basic syntax stored procedure1 CREATE OR REPLACE PROCEDURE Stored procedure name2 is3 BEGIN4 NULL;5 END;Line 1:Create OR REPLACE

To_date () is one of the representative functions of Oracle database functions, and the following is a detailed description of several uses of the Oracle To_date () function,Original address: http://database.51cto.com/art/201010/231193.htmIn Oracle

Oracle queries recently executed SQL statements select Sql_text,last_load_time from V$sql order by last_load_time Desc;SELECT Sql_text, last_load_time from V$sql WHERE last_load_time are not NULL and sql_text like ' select% ' ORDER by Las

http://blog.csdn.net/pan_tian/article/details/8169339With a little tip, Oracle EBS can bypass the job and function selection process after landing, and you can open a specific form directly so that the entire landing process is faster.Method: Oracle

Original address: http://blog.csdn.net/shangboerds/article/details/43983791--StartOne thing that these keywords have in common is that they are generally used in sub-queries. Everyone is familiar with in and EXISTS, here I do not introduce, below we

* Some here to satisfy one of the meanings, is to use or string up the comparative clauses.* Any also means satisfying one of the meanings, is also the use of or string up the comparative clauses, the difference is that any is generally used in the

1,rownum is a virtual column that must be used with 1 to use, RowNum = 1,rownum 2,if case loop To add end to ending, end if;3, foreign key, foreign key (s) references table_name (PK)4, create a table, copy the contents of Create table t_1 as SELECT

For security reasons, the SSH port of the server is modified from the default of 22 in order to 22222When installing RAC, Oracle users trust each other, but they cannot connect directly via SSH, and must add-P 22222 toThis results in a failure to

Common data types for Oracle databasesAll Oracle data types are available in 26 categoriesCharFixed-length string type length is invariant, for example: No char (10) If the value of the deposit is less than 10 characters, the other bits are also

1, String interceptSelect substr (' abcdef ', 1,3) from dual2, finding the substring locationSelect InStr (' Abcfdgfdhd ', ' FD ') from dual3, String connectionSelect ' HELLO ' | | ' Hello world ' from dual;4, 1) Remove spaces from the stringSelect

One, at the time of installation, the parameters are a bit different:Python setup.py Build InstallSecond, connect to the database, there are two ways, DSN and TNSNames way:# DSN = Orcl.makedsn (Self.oracle_host, Self.oracle_port, Self.oracle_sid) #

In some cases, it takes several very large tables to correlate the case, but the time to retrieve is a small amount of data.You can first retrieve the large table data, then insert it into the temporary table, and then associate the processing.For

Oracle11g system-level trigger to track drop misoperations Preface:The data in a table in the db is always disordered. I guess I 've experienced data synchronization operations such as drop and create, but no one knows where to operate it now,

Several Methods to convert a common Oracle table to a partitioned tableThere are four ways to convert a normal table to a Partition table: 1) Export/import method 2) Insert with a subquery method 3) Partition exchange method (SWAP Partition) 4) DBMS_

What if Oracle archive logs are full (ora-00257)? oracleora-00257 Oracle Database error ORA-00257: archiver error. Connect internal only, until freed, how to solve it? This problem is located when the archiving logs are full. We will share with you