sql table

First, suppose the following SQL table with data username = test1, passwd = test1, address = test1 CREATE TABLE `login` ( `Username` varchar (10) default NULL, `Passwd` varchar (10) default NULL, `Address` varchar (10) default NULL ) ENGINE = InnoDB

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Use of data, a data item and the other is often one or more data items have a relationship, such as a "person" object has a name, may have multiple phone numbers, and multiple children, and so on. In a traditional SQL database, the relationship

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We create the database, character set will usually be set to ZHS16GBK, sometimes, ZHS16GBK character set can not meet the needs of the business, will replace the character set to AL32UTF8, for example, ZHS16GBK character sets to two characters for ea

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declare type type_table_login_name is table of login.login_name% type index by binary_integer; v_name type_table_login_name; begin v_name (0): = 'test'; dbms_output.put_line (v_name (0)); exception when others then dbms_output.put_line ('error'); end

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Package name Header file Explain dbms_aleri dbmsalrt.sql Asynchronous event processing database dbms_application_info dbmsutil.sql Registered name of the currently running application (for performance monitoring) dbms_aqadm dbmsaqad.sql Used in conju

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dba_source DB queries where all users under the TYPE BODY, PROCEDURE, TYPE, FUNCTION, TRIGGER, JAVA SOURCE, PACKAGE BODY, PACKAGE source code, note written in java DAO layer in the sql statement in this view is not visible. Generally available text l

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I. The database import 1. Dbaccess tool environment in a database environment (such as: gdxy) Note: This step must not be set up directly in dbvis tools, the pace is always running late or an error, because command-line environment, which will be set

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Export table structure: Tools -> Export User Objects (export user objects) -> choose to export the table (including the Sequence so )-->. sql files, sql files are exported Export table data: Tools -> Export Tables -> select the table, selec

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In the table owner can not change the circumstances, you can use import and export table structure and table data, which will form the owner you want to move to the next (Note: When creating tables, especially if you log in as sysdba, then , the owne

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SQL SQL statements to optimize resource-intensive methods to determine 1.OEM 2.Statspack 3.Explain Plan 4.SQL Trace and TKPROF 5.AutoTrace Optimizer optimizer model two kinds: Rules-based RBO: (not recommended) 1 rule in the data dictionary Based on

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pl / sql table structure and table data export Export table structure: Tools -> Export User Objects -> choose to export the table (including the Sequence so )-->. sql file Export table data: Tools -> Export Tables -> select the table, selec

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SQL Server data to Oracle's plan to export Suppose you want the SQL Server Northwind database's Products table to export to Oracle User Scott First need to have SQL Server Enterprise Edition 1 Open Microsoft SQL Server Management Studio Right-click t

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A, PL / SQL Goal II, Pl / SQL Overview of Oracle Corporation developed specifically for the Oracle database as a programming language. Pl: on behalf of procedural language, procedural language. SQL: Increased cycle control, conditional programming la

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Complex data types: PL / Sql table structure: consists of two parts: one is the primary key, binary_integer type, in part out, which can be scalar type can also be recorded. How to use PL / SQL table type. 1, to declare PL / SQL table type syntax: us

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sql1 union / intersect / minus sql2; sql1 number of fields in the query must sql2 and types of fields in the query number and type of consistent, sql1 and sql2 field names can be different, the results of the query field name field name is displayed

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1, in sql2008 query analyzer, enter the following query can be found in the data access SELECT * FROM OpenDataSource( 'Microsoft.Jet.OLEDB.4.0', 'Data Source="e: \\xx.mdb";User')...gouqi 2, the access of the data into sql2008 SELECT * into sql T

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View all SQL table names: 1, select name from sysobjects where type = 'U' 2, select * from information_schema.tables Lookup table of all field names: Select name from syscolumns Where 'table name') select * from information_schema.tables select * fro

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ORDERED hint to force the Oracle tables in the From clause in accordance with the order form connections there. Through the ordered hint to avoid CBO SQL table join in the resolution process assessment, thus avoiding the error of the execution plan O

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ORDERED hint to force the From clause of Oracle in accordance with the table in the order table join. By ordered prompt resolution process to avoid CBO SQL table join in the assessment, thus avoiding a wrong execution plan Oracle or Oracle in accorda

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When we want to see a table or table space DDL time can dbms_metadata.get_ddl this package to see. dbms_metadata package get_ddl detailed parameters of the function GET_DDL function returns the original data object is created the DDL statement, detai

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• Introduction In writing PL / SQL procedure, you can define variables and constants; in PL / SQL program include: ① scalar type ② composite type ③ Reference Type ④ lob --- `Scalar type used In writing PL / SQL block, if you want to use variables, va

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sql table data to optimize clear statement Truncate Table [table name] This data can be directly emptied (delete a line by line deleted)

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/* Create temporary table space */ create temporary tablespace gsydtemp tempfile 'E:\oracle\oradata\GSYD\gsydtemp.dbf' size 32m autoextend on next 32m maxsize 2048m extent management local; /* Create the data table space */ create tablespace gsyd log

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1. Just copy the table structure sql create table b as select * from a where 1<>1 2. Replication table structure and replication data in tables sql create table b as select * from a 3. Developed field of copy table sql create table b as select row_i

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ORACLE log About using UTL_FILE Author: wangmin 1: The administrator user login, such as: conn sys / beyond @ beyond as sysdba 2: Configuring UTL_FILE operational directory Use the command: alter system set utl_file_dir = '/ opt/oracle/oracle10g/log/

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A, PL / SQL records 1 simple to use: declare type emp_record_type is record ( v_empno emp.empno% type, v_name emp.ename% type, v_sal emp.sal% type ); emp_record emp_record_type; begin select empno, ename, sal into emp_record from emp where empno = &n

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oracle variables: 1, scalar types: a single data, single single (int varchar2 date, etc.) 2, composite data types: a variable that can hold multiple values: single multi-column, single row, multi-line, multi-line multi-column Single single: record Si

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1, first determine what you want to lift the lock, execute the following code: SELECT O. OBJECT_NAME, L. * FROM ALL_OBJECTS O, V $ LOCKED_OBJECT L WHERE O. OBJECT_ID = L. OBJECT_ID 2, according to the locked object, users, etc. to determine if you wa

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Recently asked a question, InnoDB tables, only the name of a field changes, the definition does not change, whether there are fast solutions. The significance of this demand comes from, the initial design can be reserved in the table some fields, but

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88,504,018 friends like db2 oracle java came In a stored procedure to call the load command, to use the system stored procedure, one ADMIN_CMD, one DB2LOAD, the former version in the back only, I do not have this stored procedure is 8.1 using a DB2LO

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PL / SQL data types including scalar data types and complex data types. Scalar data types is simple, not elaborate. Composite data types include PL / SQL records, PL / SQL table (index tables), nested tables and variable-length arrays (VARRAY). Descr

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Recently joined the company a DBA on the database performance analysis, that speak quite well, so do the next conclusion can be considered a kind of accumulation. The overall structure of the Notes divided into three parts: The first part describes t

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------------------------------------ ----------- Defined using variables ----------------------- - Scalar variables declare v_ename varchar2 (5); v_sal number (6,2); c_tax_rate constant number (3,2): = 0.03; v_tax_sal number (6,2); begin select ename

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A first sub-table talk about why When the data reach a few million when you query the time spent will become a more, if the joint inquiry, I think there may be a die. The purpose of points in this table, reducing the burden on the database, reducing

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Friends a little more chaos in the data files themselves, then manually adjust a little bit more complicated, people lazy, call me to help do this: I started and I thought it was always seen as telecommunications, where the data, a fairly standard an

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Friends a little more chaotic data files, they manually adjust it a little bit more complicated, people lazy, call me to help do this: I began to think that I've seen with the usual, like telecommunications, where data, a fairly standard and large te

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http://space.itpub.net/16566331/viewspace-672158 oracle table to build a serious problem in this write, draw attention to: To briefly write about the wrong content, such as you have discovered and are known to approach this problem, please ignore thi

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http://space.itpub.net/16566331/viewspace-672158 oracle create table a serious problem when, in this write, draw attention to: To briefly write about the content of the error, as you have discovered and are known to approach this problem, please igno

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Dmp file in the import and export has recently spent a lot of twists and turns on. Summed up the point of experience, and share with you: Objective: To import data into a table space to another table space. Conditions: 1, two table space in a databas

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First, the preparation of related VBS script can be customized in PowerDesign in the number of commands and operations can refer to the specific contents of the [powerdesigner installation directory] \ VB Scripts directory of the script examples. How

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Test fixture to load, and when large amounts of data within the fixture, if the table have the right data, you can import directly from the table, it saves a lot of time. In lib / task directory created fixtures.rake file, the file says: namespace :d

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Need to load the test fixture, and when a large amount of data within the fixture, if the table has the right data, you can import directly from the table, this can save a lot of time. In lib / task directory created fixtures.rake file, says: namespa

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record: the collection can be stored one to many of the scalar property. pl / sql table: a pl / sql code in the "table", there is only application running during the (memory), similar to the "array", sparse, dynamically increase the si

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Oracle optimization parameters optimizer_mode Introduction Oracle SQL statement in the implementation, there are two optimization methods: a rule-based RBO and based on the price of CBO. In the SQL taught when in the end adopted optimization method,

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SELECT UPPER(F.TABLESPACE_NAME) " Table space name ", D.TOT_GROOTTE_MB " The table space size (M)", D.TOT_GROOTTE_MB - F.TOTAL_BYTES " Used space (M)", TO_CHAR(ROUND((D.TOT_GROOTTE_MB - F.TOTAL_BYTES) / D.TOT_GROOTTE_MB * 100

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Yesterday, a tragedy, with ibatis sqlserver-based database developed something, always reported near the wrong user, thought it was sqlmap configuration error, re-generate several times still the same, but later found another sql table like structure

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Mysql backup and recovery method (1) 2010-06-12 10:04 Summary This detailed analysis of the MySQL backup and recovery mechanisms, and how to preserve data tables, including the two main types of tables: MyISAM and Innodb, paper, design MySQL version

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First, suppose the following SQL table with data username = test1, passwd = test1, address = test1 CREATE TABLE `login` ( `Username` varchar (10) default NULL, `Passwd` varchar (10) default NULL, `Address` varchar (10) default NULL ) ENGINE = InnoDB

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Wrote a blog a few years, the middle write the stop, stop-write, some things have already fallen on deaf ears, and in order not to have fallen on deaf ears that the valuable stuff, so get this index. enjoy it. Asp.Net Website Optimizer Series Asp.Net

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Process system design level and goals I am in the process system design and development process, summed up a little bit, have some ideas, posted, and discussion Rough division, has achieved a level of treatment following the process engine can be sai

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