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Trying to insert values if particular column value not exist in table
I have tried with sub query in where statement
INSERT
INTO ANIMALDATA VALUES
(
( SELECT MAX(first)+1 FROM ANIMALDATA
)
,
'Animals',
'Lion',
10,
'',
'13-06-2019',
'STOP'
)
where not exists
(select NAMES from ANIMALDATA where NAMES='Lion');
If the lion not exist then do insert statement should run
Give me an idea what i am missing as i am a beginner to oracle queries. help me to proceed further. thanks in advance
Since you have a condition, I think you need to do an INSERT INTO...SELECT:
(UPDATE: the CREATE TABLE statement is there to provide simple test data. It is not part of the solution).
create table animaldata(first, kingdom, names, num, nl, dte, s) as
select 1, 'Animals', 'Tiger', 11, 'a', '13-06-2019', 'STOP' from dual;
INSERT
INTO ANIMALDATA select
( SELECT MAX(first)+1 FROM ANIMALDATA
)
,
'Animals',
'Lion',
10,
'',
'13-06-2019',
'STOP'
from dual
where not exists
(select NAMES from ANIMALDATA where NAMES='Lion');
Best regards,
Stew Ashton
please try below. Thanks,
INSERT
INTO ANIMALDATA a
select
( SELECT MAX(first)+1 FROM ANIMALDATA
)
,
'Animals',
'Lion',
10,
'',
'13-06-2019',
'STOP'
from dual
where not exists
(select 1 from ANIMALDATA b where b.NAMES='Lion' and a.NAMES = b.NAMES );
First off, don't use max(<value>) + 1 to come up with new values for a column - that does not play well with concurrent sessions.
Instead, you should create a sequence and use that in your inserts.
Next, if you are trying to do an upsert (update the row if it exists or insert if it doesn't), you could use a MERGE statement. In this case, you're trying to insert a row if it doesn't already exist, so you don't need the update part.
Therefore you should be doing something like:
CREATE SEQUENCE animaldata_seq
START WITH <find MAX VALUE OF animaldata.first>
INCREMENT BY 1
MAXVALUE 9999999999999999
CACHE 20
NOCYCLE;
MERGE INTO animaldata tgt
USING (SELECT 'Animals' category,
'Lion' animal,
10 num_animals,
NULL unknown_col,
TRUNC(SYSDATE) date_added,
'STOP' action
FROM dual) src
ON (tgt.animal = src.animal)
WHEN NOT MATCHED THEN
INSERT (<list of animaldata columns>)
VALUES (animaldata_seq.nextval,
src.animal,
src.unknown_col,
src.date_added,
src.action);
Note that I have tried to specify the columns being inserted into - that's good practice! Code that has insert statements that don't list the columns being inserted into are prone to errors should someone add a column to the table.
I have also assumed that the column you're adding the date into is of DATE datatypee; I have used sysdate (truncated to remove the time part) as the value to insert, but you may which to use a specific date, in which case you should use to_date(<string date>, '<string date format')
I am currently using the following code to pivot a table and it works perfectly. Now I want to replace any null values with 'No Data' after it is summed but I am getting errors, so I think I am placing the case statement in the wrong place.
This works:
SELECT *
FROM (SELECT PROV_NO, DATA_YEAR, DATA_MONTH, MEASURE_ID, CASES
FROM pivot_test_2)
PIVOT (SUM(CASES) FOR (MEASURE_ID) IN ('MORT_30_AMI', 'MORT_30_HF', 'MORT_30_PN'))
order by PROV_NO, DATA_YEAR, DATA_MONTH;
but this does not
SELECT *
FROM (SELECT PROV_NO, DATA_YEAR, DATA_MONTH, MEASURE_ID, CASES
FROM pivot_test_2)
PIVOT (SUM(CASES) FOR (MEASURE_ID) IN ('MORT_30_AMI', 'MORT_30_HF', 'MORT_30_PN'))
case when MORT_30_HF is null then 'No Data' else MORT_30_HF end
order by PROV_NO, DATA_YEAR, DATA_MONTH;
I get "ORA-00933: SQL command not properly ended" as the error. I'm trying to place ";" around but the error is still the same. I am currently in Oracle 11g and using Golden as my scripting/retrieval software.
You can move the CASE statement to the SELECT statement and handle the NULL values there. Better yet, use COALESCE. But unfortunately you have to do this for each item in the SELECT list:
SELECT
--Must manually reference each column.
COALESCE(TO_CHAR(MORT_30_AMI), 'No Data') MORT_30_AMI,
COALESCE(TO_CHAR(MORT_30_HF), 'No Data') MORT_30_HF,
COALESCE(TO_CHAR(MORT_30_PN), 'No Data') MORT_30_PN,
PROV_NO, DATA_YEAR, DATA_MONTH
FROM (SELECT PROV_NO, DATA_YEAR, DATA_MONTH, MEASURE_ID, CASES
FROM pivot_test_2)
PIVOT
(
SUM(CASES)
FOR (MEASURE_ID) IN
--Use aliases to make the columns easier to use.
('MORT_30_AMI' MORT_30_AMI, 'MORT_30_HF' MORT_30_HF, 'MORT_30_PN' MORT_30_PN))
ORDER BY PROV_NO, DATA_YEAR, DATA_MONTH;
A Simpler Version That Doesn't Work
Ideally you would be able to replace this part of the code:
SUM(CASES)
With this:
COALESCE(TO_CHAR(SUM(CASES)), 'No data')
Then you wouldn't need to handle each column separately. But there doesn't appear to be a way to automatically apply a non-aggregate function to the results of a PIVOT. Using the above code generates this error message:
ORA-56902: expect aggregate function inside pivot operation
Sample Schema
create table pivot_test_2
(
PROV_NO CHAR(6),
DATA_YEAR NUMBER(4),
DATA_MONTH Number(2),
MEASURE_ID VARCHAR2(250),
CASES NUMBER
);
insert into pivot_test_2
select 'A', 2000, 1, 'MORT_30_AMI', 1 from dual union all
select 'A', 2000, 1, 'MORT_30_AMI', 1 from dual union all
select 'A', 2000, 1, 'MORT_30_HF', 2 from dual union all
select 'A', 2000, 1, 'MORT_30_HF', 2 from dual;
Thanks everyone, with help from you all, I was able to cob this together and it works.
SELECT PROV_NO, DATA_YEAR, DATA_MONTH,
case when MORT_30_AMI is null then 'No Data' else to_char(MORT_30_AMI) end as MORT_30_AMI,
case when MORT_30_HF is null then 'No Data' else to_char(MORT_30_HF) end as MORT_30_HF,
case when MORT_30_PN is null then 'No Data' else to_char(MORT_30_PN) end as MORT_30_PN
FROM pivot_test_2
PIVOT (SUM(CASES) FOR (MEASURE_ID) IN ('MORT_30_AMI' as MORT_30_AMI,'MORT_30_HF' as MORT_30_HF, 'MORT_30_PN' as MORT_30_PN))
order by PROV_NO, DATA_YEAR, DATA_MONTH;
Use DECODE keyword for the query defined fields (from the list of pivot defined fields) and then replace NULL with whatever value you need. i.e., instead of NULL replace it with 'No Data'. I believe that should solve this issue.
i have a table in which i store the information (product id and description ) of all my products, description column is of type VarChar2(200). i want to format the output of this column in select statement to only result me specific part of output string. E.G Here is my simple select statement:
Select PRODUCTId, PRODUCT_DESC From ProductTable Order By PRODUCTId Desc;
this statement result me the output as:
ProductId Product_Desc
1 Oxford English-Oxford-Oxford Press-Textbook
now i want only the specific part of the output result from product_description column. i have already checked Trim() function but that did not helped me. can someone help me?
A substring function may help.
SELECT SUBSTR('ABCDEFG',3,4) "Substring"
FROM DUAL;
You can use SUBSTR() function. You can provide start and end position for the product_desc column.
The query should be like:
Select product_id,substr(product_desc,2,4) from producttable;
Here you'll get 4 chars from the second one.
I am developing an application in Oracle APEX. I have a string with user id's that is comma deliminated which looks like this,
45,4932,20,19
This string is stored as
:P5_USER_ID_LIST
I want a query that will find all users that are within this list my query looks like this
SELECT * FROM users u WHERE u.user_id IN (:P5_USER_ID_LIST);
I keep getting an Oracle error: Invalid number. If I however hard code the string into the query it works. Like this:
SELECT * FROM users u WHERE u.user_id IN (45,4932,20,19);
Anyone know why this might be an issue?
A bind variable binds a value, in this case the string '45,4932,20,19'. You could use dynamic SQL and concatenation as suggested by Randy, but you would need to be very careful that the user is not able to modify this value, otherwise you have a SQL Injection issue.
A safer route would be to put the IDs into an Apex collection in a PL/SQL process:
declare
array apex_application_global.vc_arr2;
begin
array := apex_util.string_to_table (:P5_USER_ID_LIST, ',');
apex_collection.create_or_truncate_collection ('P5_ID_COLL');
apex_collection.add_members ('P5_ID_COLL', array);
end;
Then change your query to:
SELECT * FROM users u WHERE u.user_id IN
(SELECT c001 FROM apex_collections
WHERE collection_name = 'P5_ID_COLL')
An easier solution is to use instr:
SELECT * FROM users u
WHERE instr(',' || :P5_USER_ID_LIST ||',' ,',' || u.user_id|| ',', 1) !=0;
tricks:
',' || :P5_USER_ID_LIST ||','
to make your string ,45,4932,20,19,
',' || u.user_id|| ','
to have i.e. ,32, and avoid to select the 32 being in ,4932,
I have faced this situation several times and here is what i've used:
SELECT *
FROM users u
WHERE ','||to_char(:P5_USER_ID_LIST)||',' like '%,'||to_char(u.user_id)||',%'
ive used the like operator but you must be a little carefull of one aspect here: your item P5_USER_ID_LIST must be ",45,4932,20,19," so that like will compare with an exact number "',45,'".
When using it like this, the select will not mistake lets say : 5 with 15, 155, 55.
Try it out and let me know how it goes;)
Cheers ,
Alex
Create a native query rather than using "createQuery/createNamedQuery"
The reason this is an issue is that you cannot just bind an in list the way you want, and just about everyone makes this mistake at least once as they are learning Oracle (and probably SQL!).
When you bind the string '32,64,128', it effectively becomes a query like:
select ...
from t
where t.c1 in ('32,64,128')
To Oracle this is totally different to:
select ...
from t
where t.c1 in (32,64,128)
The first example has a single string value in the in list and the second has a 3 numbers in the in list. The reason you get an invalid number error is because Oracle attempts to cast the string '32,64,128' into a number, which it cannot do due to the commas in the string.
A variation of this "how do I bind an in list" question has come up on here quite a few times recently.
Generically, and without resorting to any PLSQL, worrying about SQL Injection or not binding the query correctly, you can use this trick:
with bound_inlist
as
(
select
substr(txt,
instr (txt, ',', 1, level ) + 1,
instr (txt, ',', 1, level+1) - instr (txt, ',', 1, level) -1 )
as token
from (select ','||:txt||',' txt from dual)
connect by level <= length(:txt)-length(replace(:txt,',',''))+1
)
select *
from bound_inlist a, users u
where a.token = u.id;
If possible the best idea may be to not store your user ids in csv! Put them in a table or failing that an array etc. You cannot bind a csv field as a number.
Please dont use: WHERE ','||to_char(:P5_USER_ID_LIST)||',' like '%,'||to_char(u.user_id)||',%' because you'll force a full table scan although with the users table you may not have that many so the impact will be low but against other tables in an enterprise environment this is a problem.
EDIT: I have put together a script to demonstrate the differences between the regex method and the wildcard like method. Not only is regex faster but it's also a lot more robust.
-- Create table
create table CSV_TEST
(
NUM NUMBER not null,
STR VARCHAR2(20)
);
create sequence csv_test_seq;
begin
for j in 1..10 loop
for i in 1..500000 loop
insert into csv_test( num, str ) values ( csv_test_seq.nextval, to_char( csv_test_seq.nextval ));
end loop;
commit;
end loop;
end;
/
-- Create/Recreate primary, unique and foreign key constraints
alter table CSV_TEST
add constraint CSV_TEST_PK primary key (NUM)
using index ;
alter table CSV_TEST
add constraint CSV_TEST_FK unique (STR)
using index;
select sysdate from dual;
select *
from csv_test t
where t.num in ( Select Regexp_Substr('100001, 100002, 100003 , 100004, 100005','[^,]+', 1, Level) From Dual
Connect By Regexp_Substr('100001, 100002,100003, 100004, 100005', '[^,]+', 1, Level) Is Not Null);
select sysdate from dual;
select *
from csv_test t
where ('%,' || '100001,100002, 100003, 100004 ,100005' || ',%') like '%,' || num || ',%';
select sysdate from dual;
select *
from csv_test t
where t.num in ( Select Regexp_Substr('100001, 100002, 100003 , 100004, 100005','[^,]+', 1, Level) From Dual
Connect By Regexp_Substr('100001, 100002,100003, 100004, 100005', '[^,]+', 1, Level) Is Not Null);
select sysdate from dual;
select *
from csv_test t
where ('%,' || '100001,100002, 100003, 100004 ,100005' || ',%') like '%,' || num || ',%';
select sysdate from dual;
drop table csv_test;
drop sequence csv_test_seq;
Solution from Tony Andrews works for me. The process should be added to "Page processing" >> "After submit">> "Processes".
As you are Storing User Ids as String so You can Easily match String Using Like as Below
SELECT * FROM users u WHERE u.user_id LIKE '%'||(:P5_USER_ID_LIST)||'%'
For Example
:P5_USER_ID_LIST = 45,4932,20,19
Your Query Surely Will return Any of 1 User Id which Matches to Users table
This Will Surely Resolve Your Issue , Enjoy
you will need to run this as dynamic SQL.
create the entire string, then run it dynamically.
I have two rows that have a varchar column that are different according to a Java .equals(). I can't easily change or debug the Java code that's running against this particular database but I do have access to do queries directly against the database using SQLDeveloper. The fields look the same to me (they are street addresses with two lines separated by some new line or carriage feed/new line combo).
Is there a way to see all of the hidden characters as the result of a query?I'd like to avoid having to use the ascii() function with substr() on each of the rows to figure out which hidden character is different.
I'd also accept some query that shows me which character is the first difference between the two fields.
Try
select dump(column_name) from table
More information is in the documentation.
As for finding the position where the character differs, this might give you an idea:
create table tq84_compare (
id number,
col varchar2(20)
);
insert into tq84_compare values (1, 'hello world');
insert into tq84_compare values (2, 'hello' || chr(9) || 'world');
with c as (
select
(select col from tq84_compare where id = 1) col1,
(select col from tq84_compare where id = 2) col2
from
dual
),
l as (
select
level l from dual
start with 1=1
connect by level < (select length(c.col1) from c)
)
select
max(l.l) + 1position
from c,l
where substr(c.col1,1,l.l) = substr(c.col2,1,l.l);
SELECT DUMP('€ÁÑ', 1016)
FROM DUAL
... will print something like:
Typ=96 Len=3 CharacterSet=WE8MSWIN1252: 80,c1,d1