For example
Table 1: deparmant_master. Columns :
Department_id, deparment name
Table 2: Cadre_master. Columns :
Cadre_id, cadre_name, Department_id
Table 3: Post_master. Columns :
Post_id, Post_name, Cadre_id, Department_id
Table 4: Temp. Columns :
Department_name,Department_id,Post_id, Cadre_id, Cadre_name, Remarks
I need to write a procedure to update temp table if dept_id is null and department name is not null then update department_id from department_master, Like the same cadre is null and post id is null in temp table respecting to master I need to update the column accordingly.
If not matched records I need to update REMARKS column has unmatched/False.
Related
Assume I have a simple table in Oracle db
CREATE TABLE schema.d_test
(
id_record integer GENERATED AS IDENTITY START WITH 95000 NOT NULL,
DT DATE NOT NULL,
var varchar(50),
num float,
PRIMARY KEY (ID_RECORD)
)
And I have a dataframe in R
dt = c('2022-01-01', '2005-04-01', '2011-10-02')
var = c('sgdsg', 'hjhgjg', 'rurtur')
num = c(165, 1658.5, 8978.12354)
data = data.frame(dt, var, num)%>%
mutate(dt = as.Date(dt))
I'm trying to insert data into Oracle d_test table using the code
data %>%
dbWriteTable(
oracle_con,
value = .,
date = T,
'D_TEST',
append = T,
row.names=F,
overwrite = F
)
But the following error returned
Error in .oci.WriteTable(conn, name, value, row.names = row.names, overwrite = overwrite, :
Error in .oci.GetQuery(con, stmt, data = value) :
ORA-00947: not enough values
What's the problem?
How can I fix it?
Thank you.
This is pure Oracle (I don't know R).
Sample table:
SQL> create table test_so (id number generated always as identity not null, name varchar2(20));
Table created.
SQL> insert into test_so(name) values ('Name 1');
1 row created.
My initial idea was to suggest you to insert any value into the ID column, hoping that Oracle would discard it and generate its own value. However, that won't work.
SQL> insert into test_so (id, name) values (-100, 'Name 2');
insert into test_so (id, name) values (-100, 'Name 2')
*
ERROR at line 1:
ORA-32795: cannot insert into a generated always identity column
But, if you can afford recreating the table so that it doesn't automatically generate the ID column's value but use a "workaround" (we used anyway, as identity columns are relatively new in Oracle) - a sequence and a trigger - you might be able to "fix" it.
SQL> drop table test_so;
Table dropped.
SQL> create table test_so (id number not null, name varchar2(20));
Table created.
SQL> create sequence seq_so;
Sequence created.
SQL> create or replace trigger trg_bi_so
2 before insert on test_so
3 for each row
4 begin
5 :new.id := seq_so.nextval;
6 end;
7 /
Trigger created.
Inserting only name (Oracle will use a trigger to populate ID):
SQL> insert into test_so(name) values ('Name 1');
1 row created.
This is what you'll do in your code - provide dummy ID value, just to avoid
ORA-00947: not enough values
error you have now. Trigger will discard it and use sequence anyway:
SQL> insert into test_so (id, name) values (-100, 'Name 2');
1 row created.
SQL> select * from test_so;
ID NAME
---------- --------------------
1 Name 1
2 Name 2 --> this is a row which was supposed to have ID = -100
SQL>
The way you can handle this problem is to create table with GENERATED BY DEFAULT ON NULL AS IDENTITY like this
CREATE TABLE CM_RISK.d_test
(
id_record integer GENERATED BY DEFAULT ON NULL AS IDENTITY START WITH 5000 NOT NULL ,
DT date NOT NULL,
var varchar(50),
num float,
PRIMARY KEY (ID_RECORD)
)
I want to update single row in target table if target has two duplicate rows.
target table
Employee_Id Join_date Status Eartned_points used_vocher_cnt
123 02/01/2021 A 50 null
123 02/01/2021 A 40 null
source table
Employee_Id Join_date Status used_vocher_cnt
123 02/01/2021 A 4
There are two rows in target table and only one row has to be update with used_vocher_cnt 4
(either of the row) i.e total used vochers used by employee is 4.
UPDATE TGT
FROM (
SELECT EMPLOYEE_ID,
JOIN_DATE,
STATUS,
USED_VOCHER_CNT
FROM TARGET_TABLE
QUALIFY ROW_NUMBER() OVER( PARTITION BY Employee_id,Join_date,Status ORDER BY Eartned_points DESC)=1
)TGT,
SOURCE_TABLE SRC
SET Used_vocher_cnt=SRC.used_vocher_cnt
WHERE SRC.Join_date=TGT.Join_date
AND SRC.EMPLOYEE_ID=TGT.EMPLOYEE_ID
AND SRC.Status=TGT.Status;
Error: derived table not allowed for update
Table rental has values (ID, odo_out, date),
table vehicle has values (ID, odo, car),
both with more columns but not relevant to this.
I have attempted to create a trigger:
CREATE TRIGGER odo_update AFTER INSERT ON rental
BEGIN
UPDATE rental SET odo_out = (SELECT Vehicle.odo FROM Vehicle WHERE rental.ID = Vehicle.ID)
WHERE EXISTS (SELECT * FROM Vehicle WHERE Vehicle.ID = rental.ID);
END;
which should detect a NULL for rental.odo_out and replace it with the value in Vehicle.odo for corresponding ID. This does work, but it updates every row in table, whereas I want it to ONLY update the row with NULL, ie the new row being inserted. An ID can be repeated multiple times in the rental table. How can I do this?
You must set the condition so that only the new row is updated.
This is where you need the keyword NEW to refer to the columns of the new row:
CREATE TRIGGER odo_update AFTER INSERT ON rental
WHEN NEW.odo_out IS NULL
BEGIN
UPDATE rental
SET odo_out = (SELECT odo FROM Vehicle WHERE ID = NEW.ID)
WHERE ID = NEW.ID;
END;
I have a table that has two columns.
id|custom_id
1 |9123
2 |null
null|null
I want to output it like:
id
1
2
9123
I tried SELECT id FROM table UNION SELECT custom_id FROM table and it works fine, but the output contains an empty line which is because of null values. If use WHERE id IS NOT null as condition on each SELECT query it works. Is there any other way to achieve the desired output?
This is not more efficient than using a WHERE column is not null and it rejects duplicates from each column:
SELECT id FROM table group by id having max(id) = id
UNION ALL
SELECT custom_id FROM table group by custom_id having max(custom_id) = custom_id
Current table questions:
rowid: 1 | 2 | 3 | 4 | 5
id: 3 | 4 | 7 | 9 | 10
Trying to achieve the following:
rowid: 1 | 2 | 3 | 4 | 5
id: 1 | 2 | 3 | 4 | 5
I have tried many different variations of SQL without success, this is the latest I am testing:
UPDATE questions SET id = rowid;
Can someone please suggest how I solve this as I have googled and cannot find the solution?
I don't believe that your question completely encompasses all aspects of the issue.
In theory to have a table (the before table) where SELECT rowid, id results in
rowid: 1 | 2 | 3 | 4 | 5
id: 3 | 4 | 7 | 9 | 10
The id column must not be an alias of the rowid column (otherwise the values would be identical)
However, if the id column is an alias of the rowid column, the both columns would be the same so the before table above would not be as above.
As an example using :-
--<<<<<<<<<< WORKS >>>>>>>>>>
-- as ID is not an alias of the rowid column update changes id column
DROP TABLE IF EXISTS questionsv3;
CREATE TABLE IF NOT EXISTS questionsv3 (ID INTEGER);
INSERT INTO questionsv3 VALUES (3),(4),(7),(9),(10);
SELECT rowid, id FROM questionsv3;
UPDATE questionsv3 SET id = rowid;
SELECT rowid, id FROM questionsv3;
results in the expected result as per :-
First Select (before update) :-
Second Select (after update)
Other potential causes
rowid is not in fact the rowid as per SQLITE, but a conceptual idea that it should be 1,2,3 ...... (in which case using VACUUM, if there is no alias to the rowid, may result in the desired re-numbering of the rowid column, which if followed by the update may then result in the id being re-sequenced).
That the update is done within a transaction that hasn't been committed and is rolled back.
You may wish to consider the following permutations of different table creations (see comments) :-
-- as ID is an alias of rowid, then rowid is set according to ID so update does nothing
DROP TABLE IF EXISTS questionsv1;
CREATE TABLE IF NOT EXISTS questionsv1 (ID INTEGER PRIMARY KEY);
INSERT INTO questionsv1 VALUES (3),(4),(7),(9),(10);
SELECT rowid, id FROM questionsv1;
UPDATE questionsv1 SET id = rowid;
SELECT rowid, id FROM questionsv1;
-- as ID is an alias of the rowid column, then rowid is set according to the ID so update does nothing
DROP TABLE IF EXISTS questionsv2;
CREATE TABLE IF NOT EXISTS questionsv2 (ID INTEGER PRIMARY KEY AUTOINCREMENT);
INSERT INTO questionsv2 VALUES (3),(4),(7),(9),(10);
SELECT rowid, id FROM questionsv2;
UPDATE questionsv2 SET id = rowid;
SELECT rowid, id FROM questionsv2;
--<<<<<<<<<< WORKS >>>>>>>>>>
-- as ID is not an alias of the rowid column update changes id column
DROP TABLE IF EXISTS questionsv3;
CREATE TABLE IF NOT EXISTS questionsv3 (ID INTEGER);
INSERT INTO questionsv3 VALUES (3),(4),(7),(9),(10);
SELECT rowid, id FROM questionsv3;
UPDATE questionsv3 SET id = rowid;
SELECT rowid, id FROM questionsv3;
--<<<<<<<<<< WORKS >>>>>>>>>>
-- as ID is not an alias of rowid the ID column is updated accordingly
DROP TABLE IF EXISTS questionsv4;
CREATE TABLE IF NOT EXISTS questionsv4 (ID TEXT PRIMARY KEY); -- not an alias of rowid
INSERT INTO questionsv4 VALUES (3),(4),(7),(9),(10);
SELECT rowid, id FROM questionsv4;
UPDATE questionsv4 SET id = rowid;
SELECT rowid, id FROM questionsv4;
--<<<<<<<<<< FAILS >>>>>>>>>>
DROP TABLE IF EXISTS questionsv13;
CREATE TABLE IF NOT EXISTS questionsv13 (ID INTEGER PRIMARY KEY) WITHOUT ROWID;
INSERT INTO questionsv13 VALUES (3),(4),(7),(9),(10);
SELECT id FROM questionsv13;
UPDATE questionsv13 SET id = rowid; -- would fail no such column
SELECT id FROM questionsv13;