I want to insert data from one table into another e.g. i have a table with only one column which is 'timekey' and i want to add this timekey to another table where timekey is null. I have used this query but it is not working.
insert into files_recon_3 (timekey)
(select timekey from batch_DT)
where exists
(
select timekey from files_recon_3 where timekey is null
);
Can anyone please suggest me how to do this work. Thanks
Related
I'm new in Hive. I have three tables like this:
table1:
id;value
1;val1
2;val2
3;val3
table2
num;desc;refVal
1;desc;0
2;descd;0
3;desc;0
I want to create a new table3 that contains:
num;desc;refVal
1;desc;3
2;descd;3
3;desc;3
Where num and desc are columns from table2 and refVal is the max value of column id in table1
Can someone guide me to solve this?
First, you have to create an table to hold this.
CREATE TABLE my_new_table;
After that, you have to insert into this table, as showed here
INSERT INTO TABLE my_new_table
[PARTITION (partcol1=val1, partcol2=val2 ...)]
select_statement1;
In the select_statement1 you can use the same select you would normally use to join and select the columns you need.
For more informations, you can check here
I need to insert data of one table to another table. All the values are from the table except one SO_ID. It is coming from the Item on the page. How do I do it?
insert into T_SORDER_ITEM_INWARD
(
select sd.ID, SO_ID
into :P25_SO_ID, sd.STOCK_ID,sd.ITEM_ID,sd.UOM_ID,
sd.ITEM_CONDITION_ID,sd.ORIGINAL,sd.ACTUAL,sd.WIDTH,sd.LENGTH,sd.STOCKQTY,
sd.KANTA,sd.RATE,sd.PACKET, sd.LABEL_METER, sd.EXCESS_SHORT,sd.LOCATION_ID,
sd.CLIENT_INITIAL, sd.FIN_YEAR, sd.SERIAL_NO
from T_STOCK_DETAIL sd join t_stock_master sm
on sd.stock_id = sm.stock_id
where sm.customer_id = p25_customer
)
A simplified example:
insert into another_table (id, name, location)
select :P25_SO_ID,
t.name,
t.location
from this_table t
Always name all columns you're inserting into (first line in my example).
Your query is impossible to understand. Not just because syntax is wrong, but because we have no idea which column is supposed to get which value.
I am using Toad for oracle 12c. I need to copy a table and data (40M) from one shcema to another (prod to test). However there is an unique key(not the PK for this table) called record_Id col which has something data like this 3.000*******19E15. About 2M rows has same numbers(I believe its because very large number) which are unique in prod. When I try to copy it violets the unique key of that col. I am using toad "export data to another schema" function to copy the data.
when I execute query in prod
select count(*) from table_name
OR
select count(distinct(record_id) from table_name
Both query gives the exact same numbers of data.
I don't have DBA permission. How do I copy all data without violating unique key of the table.
Thanks in advance!
You can use UPSERT for decisional INSERT or UPDATE or you may write small procedure for this.
you may consider to use NOT EXISTS, but your data is big and it might not be resource efficient.
insert into prod_tab
select * from other_tab t1 where NOT exists (
select 1 from prod_tab t2 where t1.id = t2.id
);
In Oracle you can use a MERGE query for that.
The following query proceeds as follows for each data row :
if the source record_id does not yet exist in the target table, a new record is inserted
else, the existing record is updated with source values
For the sake of the example, I assumed that there are two other columns in the table : column1 and column2.
MERGE INTO target_table t1
USING (SELECT * from source_table t2)
ON (t1.record_id = t2.record_id)
WHEN MATCHED THEN UPDATE SET
t1.column1 = t2.column1,
t1.column2 = t2.column2
WHEN NOT MATCHED THEN INSERT
(record_id, column1, column2) VALUES (t2.record_id, t2.column1, t2.column2)
What I would like to do is;
after I insert some data into table1, I would like some of that data automatically inserted into table2, such as the primary key from table1 inserted into table2 as a foreign key.
Is this done using a trigger.
Not sure where to start looking first.
Cheers
Brian
Yes you can do that through trigger. You can do it like this:
CREATE OR REPLACE TRIGGER my_trigger
before INSERT ON table1
REFERENCING NEW AS NEW
for each row
BEGIN
insert into table2(fk_column,column1) values(:new.pk_column_of_table1,'value1');
END;
you can create a trigger as #vance said and you can use returning into clause if you are populating some of the columns dynamically
INSERT INTO t1 VALUES (t1_seq.nextval, 'FOUR')
RETURNING id INTO l_id;
have a look here
I have a question regarding a unified insert query against tables with different data
structures (Oracle). Let me elaborate with an example:
tb_customers (
id NUMBER(3), name VARCHAR2(40), archive_id NUMBER(3)
)
tb_suppliers (
id NUMBER(3), name VARCHAR2(40), contact VARCHAR2(40), xxx, xxx,
archive_id NUMBER(3)
)
The only column that is present in all tables is [archive_id]. The plan is to create a new archive of the dataset by copying (duplicating) all records to a different database partition and incrementing the archive_id for those records accordingly. [archive_id] is always part of the primary key.
My problem is with select statements to do the actual duplication of the data. Because the columns are variable, I am struggling to come up with a unified select statement that will copy the data and update the archive_id.
One solution (that works), is to iterate over all the tables in a stored procedure and do a:
CREATE TABLE temp as (SELECT * from ORIGINAL_TABLE);
UPDATE temp SET archive_id=something;
INSERT INTO ORIGINAL_TABLE (select * from temp);
DROP TABLE temp;
I do not like this solution very much as the DDL commands muck up all restore points.
Does anyone else have any solution?
How about creating a global temporary table for each base table?
create global temporary table tb_customers$ as select * from tb_customers;
create global temporary table tb_suppliers$ as select * from tb_suppliers;
You don't need to create and drop these each time, just leave them as-is.
You're archive process is then a single transaction...
insert into tb_customers$ as select * from tb_customers;
update tb_customers$ set archive_id = :v_new_archive_id;
insert into tb_customers select * from tb_customers$;
insert into tb_suppliers$ as select * from tb_suppliers;
update tb_suppliers$ set archive_id = :v_new_archive_id;
insert into tb_suppliers select * from tb_suppliers$;
commit; -- this will clear the global temporary tables
Hope this helps.
I would suggest not having a single sql statement for all tables and just use and insert.
insert into tb_customers_2
select id, name, 'new_archive_id' from tb_customers;
insert into tb_suppliers_2
select id, name, contact, xxx, xxx, 'new_archive_id' from tb_suppliers;
Or if you really need a single sql statement for all of them at least precreate all the temp tables (as temp tables) and leave them in place for next time. Then just use dynamic sql to refer to the temp table.
insert into ORIGINAL_TABLE_TEMP (SELECT * from ORIGINAL_TABLE);
UPDATE ORIGINAL_TABLE_TEMP SET archive_id=something;
INSERT INTO NEW_TABLE (select * from ORIGINAL_TABLE_TEMP);