Grosse MàJ
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olivier
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G51/ExerciceAccesConcurrentsGestionTransaction.xls
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G51/ExerciceAccesConcurrentsGestionTransaction.xls
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G51/LicenceTP01.pdf
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G51/LicenceTP01.pdf
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G51/TD01.texte
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G51/TD01.texte
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+ NOTES :
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---------
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+ Connexion depuis notre poste sur Oracle :
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sqlplus trois_dossmanno@lpdt
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+ Adresse de la documentation d'Oracle :
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http://www.oracle.com/global/fr/support/index.html
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+ Ceci permet d'aggrandir la longueur de la ligne dans SQLPLUS :
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set linesize 255
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+ Enlever les entêtes de colonne
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set heading off
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*Afficher les champs de la table V$INSTANCE
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desc V$INSTANCE;
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* Sauvegarde dans un fichier la commande
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save tssize
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* Défini l'éditeur par défaut
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define_editor=vim
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* Editer le fichier
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ed tssize
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* Lance ledit fichier
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@tssize
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+ EXERCICE :
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------------
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CREATION UTILISATEURS :
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-----------------------
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create user litt
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identified by litt
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default tablespace USERS
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temporary tablespace TEMP;
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create user trois_dossmanno
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identified by olivier
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default tablespace USERS
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temporary tablespace TEMP;
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DROITS SUR BASE :
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-----------------
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grant DBA to litt;
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grant DBA to trois_dossmanno;
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* Affiche la date pour l'utilisateur courant.
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select 'Date du jour : '|| to_char(sysdate, 'DD/MM/YYYY') " " from dual;
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INSTANCE EN COURS :
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-------------------
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select INSTANCE_NAME, INSTANCE_NAME "IDENTIFIANT", VERSION, HOST_NAME "SERVEUR", CREATED "CREATION", STARTUP_TIME "DEMARRAGE", STATUS "STATUT" from V$INSTANCE
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TABLESPACE :
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------------
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* Affiche l'ensemble des tablespaces :
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select * from dba_tablespaces;
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* Afficher les détails des tablespaces
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select ut.tablespace_name "Tablespace", ut.status "Statut", df.file_name "Fichier(s)", df.status "Statut" from user_tablespaces ut,dba_data_files df;
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AFFICHER QUELQUES DONNES SUR LA TABLE SYSTEM :
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-----------------------------------------------
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select * from dba_free_space fs, dba_data_files df where fs.tablespace_name = df.tablespace_name and fs.tablespace_name = 'SYSTEM';
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*TOTAL maximum
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select tablespace_name, to_char(SUM(BYTES)/1048579,'999D000') "Total MB"
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from dba_data_files
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group by tablespace_name
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* Affiche la mémoire utilisée pour chacune des tables
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select df.tablespace_name, to_char((SUM(fs.BYTES)+SUM(df.BYTES))/1048579,'999D00') "Total MB", to_char(SUM(fs.BYTES)/1048579,'999D00') "Libre MB" , to_char(SUM(df.BYTES)/1048579, '999D00') "Utilise MB"
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from dba_data_files df, dba_free_space fs
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where df.tablespace_name = fs.tablespace_name
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group by df.tablespace_name
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CREER un table space :
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----------------------
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create tablespace VAL_DOSS datafile '/opt/oralp/LPDT/tablespaces/data/VAL_DOSS.dbf' size 1m reuse autoextend off;
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G51/TD02.texte
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G51/TD02.texte
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Aller sur pipit/~tancrez/
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pour avoir le sujet.
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TD02 :
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Création des tables :
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create table film (
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id_film number(4) PRIMARY KEY,
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titre varchar(255),
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annee number(6),
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id_realisateur varchar(255)
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)
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TABLESPACE USERS;
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create table seance (
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id_seance number(4) PRIMARY KEY,
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heuredebut number(4),
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heurefin number(4),
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id_salle number(4),
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id_film number(4)
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create table cinema (
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id_cinema number(4) PRIMARY KEY,
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nom varchar(255),
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adresse varchar(255)
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)
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TABLESPACE USERS;
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create table salle (
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id_salle number(4) PRIMARY KEY,
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nom varchar(255),
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capacite number(3),
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id_cinema number(4)
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)
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TABLESPACE USERS;
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ALTER TABLE salle
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ADD CONSTRAINT f_id_cinema FOREIGN KEY (id_cinema) REFERENCES cinema(id_cinema);
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)
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ALTER TABLE seance
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ADD CONSTRAINT f_id_salle FOREIGN KEY (id_salle) REFERENCES salle(id_salle);
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ALTER TABLE seance
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ADD CONSTRAINT f_id_film FOREIGN KEY (id_film) REFERENCES film(id_film);
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--------------------------------------------------------------------------
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AIDE AIDE AIDE AIDE AIDE
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http://www.toutenligne.com/index.php?contenu=sql_explain&menu=sql
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Aller aussi sur : http://pipit/~3fheitz
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---------------------------------------------------------------------------
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create table PLAN_TABLE (
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statement_id varchar2(30),
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timestamp date,
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remarks varchar2(80),
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operation varchar2(30),
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options varchar2(30),
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object_node varchar2(128),
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object_owner varchar2(30),
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object_name varchar2(30),
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object_instance numeric,
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object_type varchar2(30),
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optimizer varchar2(255),
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search_columns number,
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id numeric,
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parent_id numeric,
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position numeric,
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cost numeric,
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cardinality numeric,
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bytes numeric,
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other_tag varchar2(255),
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partition_start varchar2(255),
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partition_stop varchar2(255),
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partition_id numeric,
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other long,
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distribution varchar2(30))
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tablespace USERS
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;
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----------------------------------------------------------------------------
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set linesize 255
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set wrap on
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col acces for a20
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col object_name for a10
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select id, lpad(' ',parent_id+1)||operation acces,options,object_name,parent_id,position
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from plan_table where statement_id ='MonPremierEssai';
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----------------------------------------------------------------------------
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ensuite taper la commande suivante :
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explain plan
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set statement_id ='MonPremierEssai'
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for
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select * from cinema where nom='Le rex'
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;
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Pour finalement vérifier le contenu ainsi générer :
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select operation,options,object_name,id,parent_id,position
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from plan_table
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where statement_id='MonPremierEssai' order by id
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;
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CE QUI DONNE :
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OPERATION OPTIONS OBJECT_NAME ID PARENT_ID POSITION
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------------------------------ ------------------------------ ------------------------------ ---------- ---------- ----------
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SELECT STATEMENT 0
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TABLE ACCESS FULL CINEMA 1 0 1
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¤ Pour question 2 on a :
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explain plan
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set statement_id ='MonSecondEssai'
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for
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SELECT * FROM cinema WHERE id_cinema=1908;
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set linesize 255
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set wrap on
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col acces for a20
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col object_name for a10
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select id, lpad(' ',parent_id+1)||operation acces,options,object_name,parent_id,position
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from plan_table where statement_id ='MonSecondEssai';
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¤ Ce qui donne :
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ID ACCES OPTIONS OBJECT_NAM PARENT_ID POSITION
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---------- -------------------- ------------------------------ ---------- ---------- ----------
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0 SELECT STATEMENT
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1 TABLE ACCESS BY INDEX ROWID CINEMA 0 1
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2 INDEX UNIQUE SCAN SYS_C00243 1 1
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9
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¤ Pour les jointures on a :
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explain plan
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set statement_id ='MonTroisiemeEssai'
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for
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SELECT cinema.nom, capacite
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FROM cinema, salle WHERE cinema.id_cinema=salle.id_cinema;
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set linesize 255
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set wrap on
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col acces for a20
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col object_name for a10
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select id, lpad(' ',parent_id+1)||operation acces,options,object_name,parent_id,position
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from plan_table where statement_id ='MonTroisiemeEssai';
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¤ Ce qui donne :
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ID ACCES OPTIONS OBJECT_NAM PARENT_ID POSITION
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---------- -------------------- ------------------------------ ---------- ---------- ----------
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0 SELECT STATEMENT
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1 NESTED LOOPS 0 1
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2 TABLE ACCESS FULL SALLE 1 1
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3 TABLE ACCESS BY INDEX ROWID CINEMA 1 2
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4 INDEX UNIQUE SCAN SYS_C00243 3 1
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9
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