How to create sequence when minvalue is unknown?
I am currently migrating a lot of tables (that already have data) over to using sequences. I'd like to have a script that creates these sequences without having to hardcode the minimum value that the sequence should start at.
I am trying to do something like this:
create sequence mySeq minvalue (select max(id)+1 from table) increment BY 1 cache 20;
This always gives the error "Invalid number". Can anyone provide some guidance on how to solve this problem?
Like this..?
SQL> declare
2 min_val number;
3 str varchar2(1000);
4 begin
5 select nvl(max(empno),0)+1
6 into min_val
7 from emp;
8 str := 'create sequence seq1 start with '||min_val||' increment by 1 cache 20';
9 execute immediate str;
10 end;
11 /
PL/SQL procedure successfully completed.
SQL> select seq1.nextval
2 from dual;
NEXTVAL
7935
http://download-uk.oracle.com/docs/cd/B19306_01/appdev.102/b14251/adfns_dynamic_sql.htm#i1006172
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dear all
the one thing i want to know when i use CREATE SEQUENCE in one table like this and then at that table
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nocache
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Example Number 1 ...
create sequence product_seq start with 1 increment 1
create or replace trigger product_insert before insert for each row begin
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Example Number 2 ...
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SQLWKS> create table bob(a number , b varchar2(21));
Statement processed.
First create a sequence
SQLWKS> create sequence x ;
Statement processed.
Then create the trigger.
create trigger y before insert on bob
for each row
when (new.a is null)
begin
select x.nextval into :new.a from dual;
end;
Example Number 3 ...
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X_STARTROW LIKE SXPCKLSTI1-BODY_START VALUE 1,
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X_PAGES_1 TYPE P DECIMALS 2,
X_RQTITLE LIKE SXPCKLSTI1-OBJ_DESCR,
X_RQCOPIES TYPE I VALUE 1,
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X_IMMEDIATE LIKE PRI_PARAMS-PRIMM VALUE ' ',
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In reply to your other points:
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SELECT
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FROM
( SELECT
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0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
0.10
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
1.10
2.1
2.2
select
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dual
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dual
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How to create a sequence for an particular item in my apex form
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-- lst_updt_dt and lst_updt_id.
-- Maintenance:
-- Date Actor Action
-- ==== ===== ======
-- 07-Sep-2010 J. Wells Create.
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Hi all
please
How to create sequence with alpha
like example
aaa
aab
aac
aad
aaz
aba
abb
abc
abd
abz
aca
acb
acc
acd
acz
ada
adb
adc
add
adz
xyz
xza
...DROP SEQUENCE S
CREATE SEQUENCE S START WITH 0 MINVALUE 0
DECLARE
v_decimal NUMBER;
v_base26 VARCHAR2(10);
BEGIN
FOR rec in (select s.nextval v_i from dual connect by level <= 52) LOOP
v_decimal := rec.v_i;
v_base26 := NULL;
LOOP
v_base26 := CHR(ASCII('A') + MOD(v_decimal,26)) || v_base26;
EXIT WHEN v_decimal < 26;
v_decimal := TRUNC(v_decimal / 26) - 1;
END LOOP;
DBMS_OUTPUT.PUT_LINE(TO_CHAR(rec.v_i,'999.') || ' ' || v_base26);
END LOOP;
END;
0. A
1. B
2. C
3. D
4. E
5. F
6. G
7. H
8. I
9. J
10. K
11. L
12. M
13. N
14. O
15. P
16. Q
17. R
18. S
19. T
20. U
21. V
22. W
23. X
24. Y
25. Z
26. AA
27. AB
28. AC
29. AD
30. AE
31. AF
32. AG
33. AH
34. AI
35. AJ
36. AK
37. AL
38. AM
39. AN
40. AO
41. AP
42. AQ
43. AR
44. AS
45. AT
46. AU
47. AV
48. AW
49. AX
50. AY
51. AZ
PL/SQL procedure successfully completed.
SQL> SY. -
Assigning a 'dynamically created sequence' value to a variable
in my procedure i am creating a sequence on the fly, i am preparing the name with some passed parameters like below
v_seq_name := 'seq_'||loadid||v_table_name;
execute immediate 'CREATE SEQUENCE '||v_seq_name||' MINVALUE 1 MAXVALUE 999999999999999999999999999 START WITH 1 increment by 1 cache 20';
and now after doing some operations i need to assign the current value of sequence to a number variable i tried following but not working
1) v_curr_value : = v_seq_name.currval ;
2) select v_seq_name||'.nextval' into v_curr_value from dual;
can you please suggest me how i can get the value in plsql block.DIVI wrote:
in my procedure i am creating a sequence on the fly, i am preparing the name with some passed parameters like below
v_seq_name := 'seq_'||loadid||v_table_name;
execute immediate 'CREATE SEQUENCE '||v_seq_name||' MINVALUE 1 MAXVALUE 999999999999999999999999999 START WITH 1 increment by 1 cache 20';
and now after doing some operations i need to assign the current value of sequence to a number variable i tried following but not working
1) v_curr_value : = v_seq_name.currval ;
2) select v_seq_name||'.nextval' into v_curr_value from dual;
can you please suggest me how i can get the value in plsql block.Well, you haven't given the error you are getting but I guess the procedure isn't compiling? You need to execute immediate any reference to the sequence.
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Create sequence, function and view all at once -script or something similar
Hi I would like to know in what way can I write a script or something like that which would define names for a sequence, function and a view in the beginning (for example TEST_SEQ, TEST_FJ, TEST_VIEW...) and after that create this sequence, function and view with definitions like
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INCREMENT BY 1 START WITH 1 NOCACHE NOORDER NOCYCLE;
create or replace FUNCTION TEST_FJ RETURN NUMBER AS
tmp number;
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END TEST_FJ;
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In the end I would also like to grant some rights on these objects I just created:
grant select on TEST_SEQ to public;
grant execute on TEST_FJ to public;
So my question is how to package all these things together so I can execute them from a single file in SQL Developer, and if i need to change the names of these tables I want do it in one place in the beginning of this script (or something like a script, I'm not sure what)...
Thanks in advance!hi,
hope help you...
this is my basic generic solution...
create or replace procedure createSequence( psequenceName in varchar2 ) is
begin
execute immediate 'create sequence ' || psequenceName ;
execute immediate 'grant select on ' || psequenceName || ' to public ';
end ;
create or replace function getNextVal( psequenceName in varchar2 ) return number is
queryText varchar2(100) := 'select <sequence_name>.nextval into :next_value from DUAL' ;
next_value number ;
begin
queryText := replace(queryText,'<sequence_name>',psequenceName);
execute immediate queryText into next_value ;
return( next_value ) ;
end ;
Edited by: edogt on Nov 27, 2008 5:33 AM
Edited by: edogt on Nov 27, 2008 5:35 AM
Edited by: edogt on Nov 27, 2008 5:35 AM -
How to call sequence in Oracle Forms
Hi,
I am using Oracle Developer Suite 10g. I want to call a sequence that I have created in SQL Plus. When I try to call the sequence in a trigger for a command button (WHEN-BUTTON-PRESSED) the compiler tells me that the sequence cannot be used in this context. I am passing the sequence to a procedure as a parameter. Let me show you some code:
My table is:
Location(loc_id, loc_name);
primary key is loc_id
My sequence is:
CREATE SEQUENCE loc_seq
MINVALUE 1
MAXVALUE 999999
START WITH 1
INCREMENT BY 1
CACHE 20;
My procedure is:
CREATE OR REPLACE PROCEDURE loc_change (v_loc_id IN Location.loc_id%TYPE, v_loc_name IN Location.loc_name%TYPE) AS
BEGIN
INSERT INTO Location(Location.loc_id, Location.loc_name)
VALUES (v_loc_id, v_loc_name);
COMMIT;
END loc_change;
My WHEN-BUTTON-PRESSED trigger is
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All that I need to do is generate a random number for the parameter passed that is the primary key for Location, from within my trigger. Any thoughts?This
DECLARE
nSeq number;
BEGIN
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into nSeq
from dual;
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END;should do the job...
you can also put the fetching of the sequence into the database procedure. if you have DB Version 11g, you can reference the sequence simply by this:
nSeq := loc_seq.nextval;in prior 11g you have to fetch it using select into from dual.
regards
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