s p compustat database

. Open (); intCount =cmd. ExecuteNonQuery (); Console.WriteLine ("{0} rows affected", Count); }} console.readkey ()2. Excutescalar Query First line column (return object type) //Prompt user to enter user nameConsole.Write ("Enter User Id:"); stringUserName =Console.ReadLine (); //Prompt user to enter passwordConsole.Write ("Enter Password:"); stringUserpwd =Console.ReadLine (); //Connection String stringConstr =@"server=.;

)))(Connect_data =(service_name = vgsm))) Add to the back of this file (note that LIMSTQ is not preceded by a blank). Then, create the Dblink. When database parameters are global_name=true, the database link name needs to be the same as the remote client database name. We have to make sure first. The statement that views this parameter is as follows: If it is ture, remember to create the Dblink name and the remote side of the database, very fortunate, I used the database parameter Global_name v

Database error: Ora-01116:eror in opening database file 201 Ora-01110:data file 201: '/HOME/APP/ORACLE/ORADATA/TESTMOD/TEMP02.DBF ' Ora-27041:unable to open File linux-x86_64 error:2: No such file or directory Or Ora-01122:database File 201 failed verification Check Processing ideas: 1 See if the data file exists on the operating system TEMP02.DBF file does not exist 2) View Aler.log The temp table space was created with the addition of a data file temp02.dbf, but there was no deletio

added to the original expr, and then check again. one of the magical features: You can use the database to find out MySQL or Oracle, the first query with Databae to get some results, extract the string from these results, at this time the probability of MySQL and Oracle are quite high,Finally, the database and these out of the string to do a query. Magic function Two: When the correct string cannot be spelled out, the first time with a "similar" erro

backup and Databae mirroring (only for RDS environment, The environment is more complex, waiting for more types), so we feel a little bit.Log_reuse_wait_desc to Active_transactionActive_transaction: The transaction is active (all recovery models). A long-running transaction may exist at the beginning of a log backup. In this case, another log backup may be required to free up space. Transactions are deferred (only for SQL Server 2005 Ent

Label: First, solve the problem of Talend connecting HBase: The machine used by the company is the HDP2.2 machine, which is configured with HBase service, under the/etc/hbase/conf/hbase-site.xml of the cluster, has the following configuration: Property > name >zookeeper.znode.parentname> value >/hbase-unsecurevalue> Property> This configuration is determined by Hbase master in zookeeper, which stores the root node of the data, if not specifically set, the default location i

System: Windows 10 10036Environment: Apache2.4 + PHP 5.6.5 + mysql 5.5Learning content: PHP connection database has mysqli MySQLProblems that arise:Deprecated: mysql_connect (): The MySQL extension is deprecated and would be a removed in the Future:use mysqli or PDO instead in D:\wamp\www\0316\phpdev_connect.php on line8Workaround:OneDisable PHP Error:Display_errors = OnSwitchDisplay_error = OffTwoAdd in the code:Error_reporting (E_all ^e_deprecated);ThreeHod to solve the warnings?Cu

stopped, we want to copy all the Online Redo logfiles and Standby logfiles to the new server and use alter databae rename file... to... the way to rename, did not expect is Active Standby Logfile can not be renamed (received error: ORA-01511: error in renaming log/data files ), however, you must place the Standby Logfile file in the specified directory. The following describes the status of the v $ logfile:SQL> select group #, member from v $ logfile

10 Gb. This feature provides a way to revert the database to a previous time point. You can forward a single table revert to the past. This is different from the traditional point-in-time recovery ). To flashback a database, oracle uses the older block image to discard (back out) changes to the database.This means that the Oracle block is overwritten with its previous image to back the database to a previous time point. If the flashback database is enabled, the flashback log is created in Oracl

Next, we will use a simple address book database as an example to introduce how to use mysql tool programs for database maintenance (addition, authorization, and table maintenance ). 　　 First, connect to the MySQL root account and create an addbook database: #/Usr/local/mysql/bin/mysql-u root-p Enter password: Welcome to the MySQL monitor. Commands end with; or/g. Your MySQL connection id is 207 to server version: 3.22.27 　　 Type 'HELP' for help. 　　 Mysql> create

split. IN NATURAL LANGUAGE MODE WITH QUERY EXPANSION You can also use with query expansion. Derivative version of in natural language mode. Search with in natural language mode to obtain the most relevant fields, add them to the original expr, and query them again. One of the amazing features: You can use the database to find mysql or oracle. the first query uses databae to get some results and extract strings from these results. at this time, the c

mysql tool program at last. 　　 After the root password is updated, the method for connecting to MySQL is as follows: 　　 New mysql-u root-p password Or, ask mysql for the root password: 　　 Mysql-u root-p 　　 Database maintenance Next, we will use a simple address book database as an example to introduce how to use mysql tool programs for database maintenance (addition, authorization, and table maintenance ). 　　 First, connect to the MySQL root account and create an addbook database: #/Usr/local/m

instance in Nomount form Command startup Nomount, there will be errors, when we follow the prompts to modify the text file, if we still follow the startup Nomount to start, we want to generate the corresponding binaries to overwrite the old binary file and comment%seed_control% Create databae Creating a database Creating Database Scripts Three filesControl fileData filesRedo log Files Create DATABASE Zhouyt datafile ' C:\oracle\prod

InformationView: =>dba_roles,dba_role_privs,role_role_privs,dba_sys_privs,role_sys_privs,role_tab_privs,session_roles12th chapter: BACKUP and RECOVERY1. V$sga,v$instance,v$process,v$bgprocess,v$database,v$datafile,v$sgastat2. Rman need set dbwr_io_slaves or Backup_tape_io_slaves and large_pool_size3. Monitoring Parallel Rollback> V$fast_start_servers, V$fast_start_transactions4.perform a closed database backup (noarchivelog)> Shutdown Immediate> CP files/backup/> Startup5.restore to a different

Reprint please indicate the source: http://blog.csdn.net/guoyjoe/article/details/12508471 Correct answer: E Oracle Databae 11g introduced a new concept called the ASM attribute. These properties provide a granular control of the disk group level for DBAs. The properties that you can set are listed below. 1. Allocation unit (AU) size. Starting with Oracle Database 11g, you can give au when you create a disk group. Au size can be 1MB, 2MB, 4MB, 8MB,

database >recover database; >recover datafile '/disk1/data/df2.dbf '; >alter database recover database; --recover an opened database >recover tablespace User_data; >recover datafile 2; >alter database recover datafile 2; 7.how to apply redo log files automatically >set AutoRecovery on >recover automatic datafile 4; 8.complete Recovery: --method 1 (Mounted databae) >copy c:\backup\user.dbf c:\oradata\user.dbf >startup Mount >recover datafile ' c:\or

Active|activex test.asp The following is the program code '--------------------------------------------------------- ' ActiveX component application Example One ' Read the authors table in SQL Server 7 pubs database and page to display ' ASP file is responsible for calling and foreground data validation, where the page parameter is mainly ' This example completely uses ActiveX components to complete the function, fast, good confidentiality, but the page customization ability is poor ' JJX by 2

Tags: order margin fast BAE data param code BSP BER databae = physical files, logical structures that compose physical files View database name Sql> Show Parameter Db_nam NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ Db_name string Gaga01 Sql> select name from V$database; NAME --------- GAGA01 Sql> To view the instance name: Sql> Show Parameter Instance_n NAME TYPE VALUE -------

Label: four querying records The most common use of records in a data table in a MySQL database is a recorded query, and the records in the Operation data table are mostly recorded queries. Find The syntax structure of the record is: SELECT select_expr [, select_expr ...] [ From Table_refereneces [WHERE Where_condition] [GROUP by {col_name | position} [ASC | DESC],...] [Having where_condition] [ORDER by {col_name | expr | position} [ASC | DESC],...] [LIMIT {[offset,] row_count | row_count o

command will create a TRC file under the Udump directory. Note the following related entry: Maxlogfiles 8 maxlogmembers 3 In this example, you can build up to 8 logfile groups, each groups can include up to 3 member. Now we can add SRL to standby databae (of course, standby Databaes must be in Mount State) sql> ALTER DATABASE Add standby logfile Group 4 (' C:\ORACLE\ORADATA\STANDBY\STBY04. LOG ') SIZE 5M; You can add member to a group: