diff --git a/columns_to_line b/columns_to_line
new file mode 100644
index 0000000..62638ad
--- /dev/null
+++ b/columns_to_line
@@ -0,0 +1,20 @@
+select 
+nom_prenom,
+adresse,
+code_postal,
+ville,
+date_denvoi,
+type_de_travaux,
+from 
+(SELECT 
+nom_prenom,
+adresse,
+code_postal,
+ville,
+date_denvoi,
+type_de_travaux,
+ 
+unnest(array[pj1 ,si_pj1_autres_type ,pj2 ,si_pj2_autres_type ,pj3 ,si_pj3_autres_type ,pj4 ,si_pj4_autres_type ,pj5 ,si_pj5_autres_type ,pj6 ,si_pj6_autres_type ,pj7 ,si_pj7_autres_type ,pj8 ,si_pj8_autres_type ,pj9, si_pj9_autres_type]) AS nom_PJ
+FROM synthese_publipostage) ttl
+
+-- ces avec Postgressql
diff --git a/oracle b/oracle
new file mode 100644
index 0000000..bdb9db1
--- /dev/null
+++ b/oracle
@@ -0,0 +1,43 @@
+TO_CHAR(CURRENT_DATE, 'dd/MM/yyyy')                            -- convertir a char
+TO_CHAR(CURRENT_DATE, 'dd/MM/yyyy HH:mm:ss')||';'||
+to_date(t2.date_DEBUT,'DD/MM/YYYY')                            -- -- convertir a date
+
+select FLOOR(DBMS_RANDOM.VALUE(1,12)) from dual;                --- generer une valeure random
+
+select (sysdate + dbms_random.value(-3000,-100)) from dual;   --- generer une date random
+
+SELECT SYS_GUID() FROM dual;                                    ---pour generer un id unique en forme de varchar 
+ROW_NUMBER() OVER (ORDER BY 1)+200                              --un id incremental +200
+ROW_NUMBER() OVER (ORDER BY 1) as "id"                          --un id incremental
+((ROW_NUMBER() OVER (ORDER BY 1)*2)-1) as "id"                  --un id incremental impaire
+(ROW_NUMBER() OVER (ORDER BY 1)*2) as "id"                      --un id incremental paire
+--------------------------------------------------------------------------------------------------
+"ID" NUMBER GENERATED BY DEFAULT AS IDENTITY                -- declaration de la colonne 
+-- création d'une séquence peux être intéressant aussi pour garder une incrémentation successive 
+---------------------------------------------------------------------------------------------
+---trouver le max ou le min de la table et continuer a incrementer !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+select max("id") over (partition by 1) + row_number() over (partition by 1 order by 1), id2 from presta;
+----------------------------------------------------------------------------------------------------------------------------------------
+SELECT
+		f6, proj,
+		ROW_NUMBER() OVER (PARTITION BY  f6, proj ORDER BY f6, proj) as num_occu
+	FROM  TBD84 T84;
+-----------------------------------------------------------------------------------------------------------------------------------------
+'||';'||'  concatenation de char
+--------------------------------------------------------tester un date ------------------------------------------------------------------
+create function test_date(d varchar2) return varchar2
+is
+  v_date date;
+begin
+  select to_date(d,'yyyy-mon-dd hh24:mi:ss') into v_date from dual;
+  return 'Valid';
+  exception when others then return 'Invalid';
+end;
+----------------------------------------------------------------------------------------------------------------------------------------
+select your_date_col, test_date(your_date_col)
+from your_table;	
+----------------------------------------------------------------------------------------------------------------------------------------
+SELECT nom_du_vendeur, valeur_de_la_vente,
+  LAG(valeur_de_la_vente) OVER(ORDER BY valeur_de_la_vente) as valeur_de_vente_precedente
+FROM vente;
+----------------------------------------------------------------------------------------------------------------------------------------
diff --git a/recherche d'une colonne dans la base de donnes b/recherche d'une colonne dans la base de donnes
new file mode 100644
index 0000000..892a597
--- /dev/null
+++ b/recherche d'une colonne dans la base de donnes	
@@ -0,0 +1,10 @@
+--recherche d'une colonne dans la base de donnes 
+select t.owner as schema_name,
+       t.table_name , col.column_name
+from sys.all_tab_columns col
+inner join sys.all_tables t on col.owner = t.owner 
+                              and col.table_name = t.table_name
+where col.column_name = 'IICORR'
+--and col.owner not in ('')
+order by col.owner, 
+         col.table_name;