Oracle

4.1 IF StatementIF statement two forms; If-then if-then-else using If-then, you can specify a set of actions that need to be performed. If-then-else statement specifies two sets of actions1. If-then true to execute a statement sequenceStructure:IF

The 6th chapter of Administrator's Guide describes the memory management of Oracle instances, where Oracle uses automatic memory management (AMM) to manage the size of the SGA and PGA by default in 11g. In addition to the default methods, you can

How to unlock an Oracle account (locked)In Plsql Developer If you are prompted to ora-28000 the account by Scott/tiger loginLockedWorkaround:After the newly installed oracle10g, with the Scott/tiger test, the following error message will

aggregate function: (ignores null data) There are 5 commonly used: aggregating all the data in a field in one piece1, sum (field name): Sum2, AVG (field name): Averaging3, max (field name): Ask for maximum value4, min (field name): Minimum value5,

--to obtain the server-side IP -: $: theSYS@XXX> SelectUtl_inaddr.get_host_address fromdual; Get_host_address--------------------------------------------------10.19.2.XX--Resolving domain Names -: $: +SYS@XXX> SELECTUtl_inaddr.get_host_address ('www.

Oracle Rights Management DetailedReprint--czmmiao's Blog LifeOracle PermissionsPermissions allow users to access objects or execute programs that belong to other users, and the Oracle system provides three permissions: Object-level, system-level,

In fact, Oracle comes with a demo mode, and I've been kneeling to lick the outside of the training organization's SQL fileFirst log in to the SQL system userInput:Alter User by HRLogin user hr via password hrRun under

Character function--return character valueThese functions all receive parameters of the character family type (except CHR) and return the character value. In addition to the special instructions, most of these functions return a numeric value of

Oracle Delete User prompt cannot delete the currently connected user two solutions are as follows: 1, first lock the user, then query the process number, and finally delete the corresponding process, in the deletion of the corresponding users

Processing process:1, the View user's proifle is that, generally is the default:Sql>select username,profile from Dba_users;2. View the password expiration settings for the specified profile (such as default):Sql>select * from Dba_profiles s WHERE

non-routine recovery with Oracle Dul tool to recover data from drop-deleted Oracle data tables without backupDul to recover a drop object, you need to provide two information1. Table space to which the deleted table belongs (not required)2. Deleted

Creating a Create script for an existing job in an Oracle database --generate a Create script for an existing job Create or Replace procedureProc_generate_job_create_sql is beginDbms_output. ENABLE (Buffer_size= NULL);--indicates that the output

Recently started to study Oracle database, the company's system is either Oracle or MySQL.As an IT worker, it's an incredible thing not to touch Oracle. It's too low to think about the past few years, or even the start of the IT industry, when

Many of the experiments in Oracle are carried out in the case of damage to specific blocks.The common DD command can only specify blocks from block 1th to how many blocks, and cannot specify a specific blockSimilar to the following command, this is

When using the Oracle JDBC driver, are there some problems that you can solve by replacing different versions of the Oracle JDBC driver? There are multiple versions of the most commonly used ojdbc14.jar, and there are multiple versions of

SELECT * from EMP;--1. Identify 30 of employees in the departmentSELECT * from emp where deptno = 30;--2. List the names, changes, and department numbers of all clerks (clerk)SELECT * from emp where job = Upper (' clerk ');--3. Identify employees

One, multi-table queryA multi-table query is a query that queries data from multiple tables that are associated with a syntax similar to a single-table query. In general, tables with multiple table queries are linked together, and if not, the query

To achieve the current time, week, month, quarter, half year, years of conversion, where special attention is to the processing of the week, the IW way of handling logic, if this week has greater than or equal to 4 days, this week belongs to a few

First, the database design paradigm and its significance and shortcomingsThe design paradigm of database is the specification that database design needs to meet, the normalization of database is the way to optimize the structure of table and how to

CREATE TABLE SpaceCreate Tablespace BOSSTempfile ' d:/oraclexe/boss.dbf 'Size 500MAutoextend on next 50M maxsize 4000M;Delete Table spaceDrop tablespace BOSS including contents and datafilesmodifying character setsALTER SYSTEM ENABLE RESTRICTED