Oracle

Solution 1 (for large datasets, query efficiency is significantly affected ): Select *From (Select rownum RN, ta .*From (Select T. ID, O. Name YYB, U. Name XM, T. MCFrom tzdysx T, Tuser U, lborganization oWhere T. CJR = U. ID and U. orgid = O.

Vector returned = bqueryclient. queryvaluebysql ("select func_foo (A, B) from dual"); hashtable table = (hashtable) returned. get (0); // The returned value is a vector with a table bigdecimal dec = (bigdecimal) table. get ("func_foo"); // the

An error is reported when updating table partition fields, because partitions generally specify different tablespaces. When updating a field's exaggerated Partition Rules, you must: Alter table ** enable row movement; In this way, you can update

The following is an explanation of the autotrace parameter:   Option description Set autotrace on outputs the execution results, statistical information, and execution plan information at the same time. Set autotrace off disable the execution

1. modify Oracle startup parameters Two methods: The first is to use this parameter file to create a server parameter file after modifying the Oracle startup parameter file.   A. Create a pfile based on the existing spfile. SQL> Create pfile

[Solution 1 ]:On Error goto 11Dim hiscnn as ADODB. ConnectionDim hisrst as ADODB. recordsetDim ssql as stringDim izds as integerDim SBT as stringDim stemp as stringDim hiscmd as new ADODB. CommandDim para1 as new ADODB. ParameterDim para2 as new

Document directory · Character Functions · Numeric Functions · Date functions · Conversion functions · General Functions I. common syntax -- 1. drop table name cascade constraint -- 2. when the content in the parent table is deleted, the

I have been reading books on JavaWeb recently and learning about jsp-related topics. No matter what you learn, you will encounter problems related to database connection. In addition, if you do not fully understand it, it will be a long time for you.

Depressed, extremely depressed, yesterday installed oracle11g, and then installed PlSql8, open any project page to report the following error, it is inexplicable, This is the C drive machine. config. How can this problem be solved! My system is win7

This article uses two methods to solve this problem when I often encounter password loss when I use Oracle. One method: sqlplus "/ as sysdba" SQL>startup SQL>alter user system identified by root123;

Exercise 1 1. query the structure of the dept tableIn the command window, enter:Desc dept; 2. Retrieve all column information in the dept tableSelect * from Dept 3. Search for the employee name, monthly income, and department number in the EMP table.

1. file IO statistics Select TS. Name, DF. Name File_Name, FS. Phyblkrd Blocks_Read, FS. Phyblkwrt Blocks_Written, FS. Phyblkrd + FS. Phyblkwrt Total_IOs From V $ filestat fs, V $ datafile df, v $ tablespace TS Where DF. File # = FS. File # And df.

I recently learned about Oracle databases and encountered some minor problems during the installation process. Although it was a minor problem, it made me spend a lot of energy trying to sum up and finally solved the problem, the mood is

Typical use of tablespace creation:  Create tablespace ts_name datafile 'd:/oracle/.../xxx. dbf' size 1024 m autoextend on next 500 m maxsize unlimited;   View the information of the existing tablespace: Select upper (F. tablespace_name) "tablespace

Common oracle string functions: Searches for string matching and returns the start index of matching. Instr (source string, target string, start position, matching serial number ): Source string: Nothing to say Target string: the string to be

Importing and exporting Oracle Data imp/exp is equivalent to restoring and backing up oracle data. The exp command can export data from the remote database server to the local dmp file, and the imp command can import the dmp file from the local to

1. Lock To prevent users from concurrently accessing and modifying resources at the same time, ORACLE uses different types of locks to control concurrent access to data to prevent destructive interaction between users.Oracle automatically locks

1. Change the password of the local Oracle user sys and system to oracle;2. Create a local table space TS_ESTORE and set the size of the specified partition (extent) to 128 kb. The initial size of the file is 1 MB, which is automatically expanded to

I. Connecting SQL Server to Oracle1. Configure the ODBC data source for Windows:Choose "start"> "Settings"> "Administrative Tools"> "Data Source (ODBC)"> "Configure user DSN" or "system DSN:Add-select Microsoft ODBC for Oracle-Custom Data Source

Document directory 1. No input parameter stored procedure call 2. input parameter stored procedure call Iii. INOUT process call I. general format of the call PROCESS IN Pb Declare my_proce procedure for p_get_name; // call execute my_proce