mastering oracle sql

It was freezing, and I stayed at home and read "Mastering Oracle SQL" 2nd. I found that Oracle is still very powerful, and there are two hundred optical functions. It is difficult to simulate the Object-Oriented Query languages, in particular, Windows functions for OLAP in sql2003.Fortunately, hibernate3.0 also support

Oracle cold, stay at home and read the "Mastering Oracle SQL" 2nd, found that Oracle's function is still very strong, there are 200 optical functions, hsql is difficult to match. The next stubborn, it seems either to risk using Hibernate3.0 SQL mapping function, or to run th

Tags: Connection query sequence developer save set bound goto RowType View\ t 1th Introduction to PL/SQL development1th Oracle 11g Database System1.1 Introduction of relational database system1.1.1 What is a relational data model1.1.2 Database System Paradigm1.1.3-relational database management system1.1.4 using SQL statements to communicate with database managem

environments may run with the following error message. For SQL Monitor's active format report, the online approach is still recommended, and offline viewing allows the script to be downloaded locally. If the report shows an error as follows: For online viewing, it may be a question of the generated report format and see if these options are set beforehand. Set Trimspool on Trim on Set pages 0 Linesize 1000 Set Long 1000000 longchunksize 100000

procedures cannot have the same name in SQL) @str nvarchar( -) as Print @str Go execUp_printexecUp_print1'Oh, hello.' --stored procedure with output parameters Create procedureUp_print2@xing nvarchar(1), @ming nvarchar(5), @rtn nvarchar(6) Output as Set @rtn=@xing+@ming Go Declare @rtn nvarchar(6) execUp_print2'Li','Tao',@rtnOutputPrint @rtn ----Write a new student's deposit process Up_insertstu if(object_id('Up_insertstu','P')) is not NULL

Creating a Redo log group and its members4.2.4 redefining and renaming log members4.2.5 deleting redo log groups and their members4.2.6 Manually switch logs4.2.7 emptying the Redo log file4.2.8 viewing redo log file information4.2.9 OEM Management redo log files4.3 Managing the collation log4.3.1 The concept of archived logs4.3.2 Setting the database schema4.3.3 Setting archive targets4.3.4 Setting the trace level of the archive process4.3.5 Viewing archived log information4.4 Parsing Redo log

Tags: RAC ORACL table structure Operations Direct format FFFFFF text formatted outputVideo lesson: Li Xinghua Oracle from Getting started to mastering video lessonsLearner: Sun Luo nuoVideo Source: 51CTO College If you want to query, you must use the query part of the DML support, relative to the simple query, the popular understanding is that all records are queried, but you can control the display o

deployment that uses SQL database, this article is described in Express SQL 2012.1, first we install ADK when the Microsoft SQL Server Express (8.1 and 10 are both 2012Express, you can also choose to install the full version of SQL):650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/72/C1/wKiom1XsYkTyRv4cAAGbR

Tags: 2.4 glob SQL User LTE student code gate HAR1. LockConcurrency problems occur when multiple users modify the same data at the same time, and a transaction can be used to solve the problem. However, in order to prevent other users from modifying the data in another transaction that is not yet completed, a lock is required in the transaction.SQL Server 2008 provides a variety of lock modes: exclusive, shared, update, intent, key range, schema, and

Table name (Column name data type [default defaults],Column name data type [default defaults],Column name data type [default defaults],Column name data type [default defaults],...Column name data type [default defaults]);CREATE TABLE member (Mid number,Name VARCHAR2 (default ' Noname '),Birthday Date Default Sysdate,Note CLOBInsert into member (Mid,name,birthday,note) VALUES (1, ' AA ', to_date (' 1980-09-08 ', ' yyyy-mm-dd '), ' aaaaaaaaaaaaaa ');Insert into member (Mid,name,birthday,note) VAL

fromMyUserInner JoinMyBook onMybook.userid=Myuser.userid;SelectMybook.bookname,myuser.username,myuser.userage fromMyUser Left JoinMyBook onMybook.userid=Myuser.userid;SelectMybook.bookname,myuser.username,myuser.userage fromMyUser Right JoinMyBook onMybook.userid=Myuser.userid;SelectMybook.bookname,myuser.username,myuser.userage fromMyUser Full JoinMyBook onMybook.userid=Myuser.userid; The difference between these joins can be clearly observed from the result, and the first connection will cre

"/>8. To view the Test OU information, the computer has joined the Test OU normally:650) this.width=650; "height=" 389 "title=" clip_image018 "style=" margin:0px;border:0px;padding-top:0px; Padding-right:0px;padding-left:0px;background-image:none, "alt=" clip_image018 "src=" http://s3.51cto.com/wyfs02/ M02/72/f1/wkiom1xv_kxqfmbnaadlboxfklq408.jpg "border=" 0 "/>9, view IE Home information configuration is normal:650) this.width=650; "height=" 419 "title=" clip_image020 "style=" border:0px;paddi

Tgr_valid_dataGoCreate Trigger Tgr_valid_dataOn studentAfter insertAs DECLARE @age int, @name varchar (20); Select @name = s.name, @age = s.age from inserted s; if (@age Begin RaisError (' Age of inserting new data ' is problematic ', 16, 1); Rollback Tran; EndGo--testINSERT into student values (' Forest ', 2, 0, 7);INSERT into student values (' Forest ', 22, 0, 7);SELECT * FROM student the order by ID;# example, action logif (object_id (' Log ', ' U ')

statement block, and the statement of the TRY statement block is no longer executed.4. Common functions 4.1. Data type Conversion functionsBy default, SQL Server automatically converts some data types, which are called implicit conversions. If you encounter an automatic conversion, you need to convert it with the cast () function and the Convert () function, which is called an explicit conversion. The cast () function and the convert () function are

Stu_detail--second row description table connection on student.s_id = stu_detail.s_id; --The third line describes the conditions of the connection, usually the ID is equal 2. Full-Outer connection A full outer join, also known as a full outer join, returns all the record data in two connections. In the student table and the Stu_detail table, use the full outer join query, as in the following statement. Use test SELECT student.name,stu_detail.addr From student full OUTER JOIN Stu_detail on stud

modify the specified - execsp_rename'Q_user.uismullogin','Upwds' - execsp_rename'Q_user.upwds','Uismullogin'--There's a constraint that doesn't seem to be renamed in - to Alter Table Book + AddBook_copy_novarchar(Ten), Publish_datesmalldatetime - the Alter TableQ_user * --add test nvarchar check (len (test) >6), SS Int--Add a column $ --Drop Column Test-when you delete a constrained column, you delete its subordinate columns (if this is done directly with visual action) Panax Notogi

‘;Attaching a databaseAttach the database to a different server instance using the detached data file and transaction log file. You can attach replicated and detached databases.Attach Database command No log attach database commandCREATE DATABASE test ON( FILENAME=‘C:\Program Files\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL\DATA\test.mdf‘ )FOR ATTACH_REBUILD_LOG;Multiple. mdf,.ndf,.ldf file Attach database commandsCREATE DATABASE School_MIS

program, you canIs that every project contains complex queries, so how can programmers be freed from complex queries?So in this case, the concept of view is presented. The use of views enables encapsulation of complex SQL statements. From the actual openIn other words, a good database designer, in addition to giving a reasonable data table structure, should also be able to use allThe query is packaged as a view and presented to the developer.A means

=" http://s3.51cto.com/wyfs02/M00/72/BD/wKioL1XsZK7RuLWcAAETvzCdaqE676.jpg "/>650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/72/C1/wKiom1XsYomTatPtAAFXrHLQhxQ802.jpg "/>650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M01/72/BD/wKioL1XsZLTx4TQXAAFxsqTTEPc390.jpg "/>When enabled, it appears as follows:650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M01/72/C1/wKiom1XsYo_g4W-lAAEDSSnmED4421.jpg "/>4. Configure TCP/IP properties port to 1433:650) this.width=650; "src=" http:

1. Import table in the same format as the two tables, import data from one table into another table.There are now two records in the Person_old table. Next, insert all the records from the Person_old table into the person table, with the following statement:INSERT into person (id,name,age,info)SELECT Id,name,age,info from Person_old;2. "Modify multiple rows of data"In the person table, update the records with an age value of 19 to 22, change the Info field value to student, and open the Query ed