MongoDB

If you have successfully installed DB2 /. profile configuration, the installation may fail again, and /. profile configuration to restore. You must have the root permission to uninstall DB2. 1. delete a database Su-db2inst1 (here db2inst1 is an

During the development of DB2, database maintenance is another important part throughout the development process. It is necessary to maintain a large information system; leave a simple maintenance manual for emergency purposes. Some of the following

28. Run statistics on a table Db2-v runstatson table TAB_NAMEand indexes all 29. Check whether RUNSTATS is executed on the database. Db2-v "select tbname, nleaf, nlevels, stats_timefrom sysibm. sysindexes" 30. Change the buffer pool size. In the

  Scenario 1: upgrade an instance from 32-bit to 64-bit   Upgrade an instance   The current database instance is 32-bit. You can view it through db2level. If you want to upgrade the instance to 64-bit,   Method 1. Execute./db2iupdt-w 64-u db2fenc1

The create tablespace statement defines the tablespace, assigns containers to the tablespace, and records the table space definitions and attributes in the catalog.Permission: SYSCTRL or SYSADM Syntax: >-CREATE -- + ----------------------- + --------

Problem description: Install DB2 SERVER in the cloned VM. As a result, the port is occupied and the port is changed from 5000 to 50001. The same error message is displayed. Cause: The IP address of the cloned VM is the IP address of the cloned VM.

I'm glad that you have read this article. First of all, you need to explain that this article is suitable for beginners and developers who are new to DB2 to read. If you think it is good, you can bypass it. This article is also a summary of my own

1. How to quickly obtain the size of the storage space occupied by the database (zz) select tbspace, sum (aa. total_pages * bb. pagesize)/1024/1024 "size (m)" from table (snapshot_container ('sdclr ',-1) as aa, syscat. tablespaces bbwhere aa.

In db2, it is easier to change the size and number of log files. You only need to modify two parameters, which is more convenient than ORACLE. By default, log files are stored in the SQLOGDIR directory. [Huateng @ db2server SQLOGDIR] $

The use of the DB2 merge into statement the Merge statement in DB2 can MERGE the data in one table INTO another, and insert, delete, update, and other operations according to the conditions at the same time, very powerful. Syntax: Explain merge into

DB2 VALUE function www.2cto.com Syntax: VALUE (EXPRESSION1, EXPRESSION2) VALUE function is to return a non-empty VALUE, when the first parameter is not empty, directly return the value of this parameter. If the first parameter is null, the value of

SQL CREATE FUNCTION "DB2INST1" in the last month of DB2 ". "QTR" www.2cto.com ("DDATE" DATE) returns character (7) SPECIFIC "DB2INST1 ". "SQL130225092927300" language SQL not deterministic reads SQL DATA STATIC DISPATCH CALLED ON NULL INPUT EXTERNAL

When you modify a table name in db2, the table cannot have foreign key constraints and cannot be referenced by views ......... -- Example rename table into TCASH_AVMACCOUNT; rename table TPA_BOMACCOUNT TO TCASH_BOMACCOUNT; rename table failed TO

DB2 tablespace and buffer pool principles: 1. the space size settings of the intermediate table and target fact table are based on the space settings of the source table. (Calculate the data volume of the last year) 2. The data volume of the

The source method of the DB2 custom function is created in the coolsql Editor: 1. Obtain the day of the current time. Create function fmt_dt (timestamp) returns varchar (32) source day (timestamp) test: select fmt_dt (current datetime) from SYSIBM.

DB2 restore deleted table test: (Test Platform: RHEL 5.4 DB2 V9.7.0) -- Haha, a newbie! I just read Master Niu's book and made an example. I am familiar with it. By the way, I will show myself up to satisfy my vanity! -- The following is an example

The db2 tutorial is: DB2 programming skills (10 ). 4.11 db2 Environment VariablesAfter db2 is reinstalled, set the environmental variables of db2 in the following way to ensure that the sp can be compiled.Put set_cpl on AIX, chmod + x set_cpl, and

The db2 tutorial is: DB2 programming skills (7 ). 3.4 view the tables used by the spSelect bname from syscat. packagedep where btype = 'T' and pkgname in (select bname from sysibm. sysdependencies where dname in (select specificname from syscat.

The db2 tutorial is: DB2 programming skills (4 ). 1.10 prevent handling of Null Field ValuesSelect deptno, DEPTNAME, COALESCE (MGRNO, 'absent'), ADMRDEPTFROM DEPARTMENTThe COALESCE function returns the first non-empty expression in the () expression

The db2 tutorial is: DB2 programming skills (3 ). The other isPcursor1: for loopcs1 as cousor1 cursorSelect market_code as market_codeFrom tb_market_codeFor updateDoEnd;The advantage of this method is that it is relatively simple, and open, fetch,