how Insert data use execute immediate in oracle? - sql

Question

I am using oracle 10g . I want execute dynamic insert query into that fields are select from another query in procedure .
sql_stmt := 'INSERT INTO tt_causalvarien VALUES(:breakdate, :batch, :procode, :rpcaption, :rvminmaxs, :rpvalue)';
EXECUTE IMMEDIATE sql_stmt USING select brkngdte,batch,prdtcode,'RP1','S',getminmax('qtyadded','vttrcwfdetatdryer','S','prdcode','PRC002','vttrcwfaddatdryer') Test_Sample
from skybluem.VMtrcwfhdailyplansheet;
Can you please help ? And can you give me tips how to write this type of queries.

Answer 1

Not sure if i got your example right by what is static and what is dynamic, but in general for that purpose you don't need execute immediate, you can just insert into a table with a select from:
INSERT INTO tt_causalvarien
SELECT brkngdte,batch,prdtcode,'RP1','S',getminmax('qtyadded','vttrcwfdetatdryer','S','prdcode','PRC002','vttrcwfaddatdryer')
FROM skybluem.VMtrcwfhdailyplansheet;

Answer 2

Dynamic queries are used to build SQL statement at runtime. As you have access to the whole statement as text, you have much more flexibility than by using SQL statements that are known at compilation time. See Oracle's documentation.
Broadly speaking, you need dynamic SQL if you need to change something else than a value in your SQL query.
Given your example, you have 3 options:
As explained by #evilive in her own answer, given your example, you can rewrite your statement as a simple INSERT ... SELECT. Please note this does not necessarily insert one row. Depending your data/exact query, this can trigger the insert of several rows. Or of no rows at all.
You can use PL/SQL SELECT .. INTO and data substitution (
don't forget to declare as needed the variables:
breakdate, batch, procode,
rpcaption, rvminmaxs,
rpvalue)
select "brkngdte", "batch", "prdtcode", 'RP1', 'S',
getminmax('qtyadded', 'vttrcwfdetatdryer', 'S', 'prdcode', 'PRC002', 'vttrcwfaddatdryer') Test_Sample
into breakdate, batch, procode, rpcaption, rvminmaxs,
rpvalue
from skybluem.VMtrcwfhdailyplansheet;
INSERT INTO tt_causalvarien VALUES(breakdate, batch, procode, rpcaption, rvminmaxs, rpvalue);
This will trigger an exception if the `select` statement returns no row or several rows.
If you really need to build the INSERT query dynamically (say because the name of the table in only known at runtime):
sql_stmt := 'INSERT INTO ' || some_table || ' VALUES(:breakdate, :batch, :procode, :rpcaption, :rvminmaxs, :rpvalue)';
-- ^^^^^^^^^^^^^^^^
-- *this* require dynamic SQL
select "brkngdte", "batch", "prdtcode", 'RP1', 'S',
getminmax('qtyadded', 'vttrcwfdetatdryer', 'S', 'prdcode', 'PRC002', 'vttrcwfaddatdryer') Test_Sample
into breakdate, batch, procode, rpcaption, rvminmaxs,
rpvalue
from skybluem.VMtrcwfhdailyplansheet;
EXECUTE IMMEDIATE sql_stmt USING breakdate, batch, procode, rpcaption, rvminmaxs, rpvalue;
Once again, as you are using SELECT ... INTO the PL/SQL runtime ensure that one and only one row will be selected. And will trigger an exception if this is not the case.
In addition, as per OP request, if the SELECT query is dynamic too, you might use EXECUTE IMMEDIATE ... INTO to fetch the row data. After that, depending your use case, you can go either for a EXECUTE IMMEDIATE ... USING of a plain INSERT statement. Here is a "fully dynamic" example:
sel_stmt := 'select "brkngdte", "batch" ... from skybluem.VMtrcwfhdailyplansheet';
sql_stmt := 'INSERT INTO ' || some_table || ' VALUES(:breakdate, :batch, :procode, :rpcaption, :rvminmaxs, :rpvalue)';
EXECUTE IMMEDIATE sel_stmt
INTO breakdate, batch, procode, rpcaption, rvminmaxs, rpvalue;
EXECUTE IMMEDIATE sql_stmt
USING breakdate, batch, procode, rpcaption, rvminmaxs, rpvalue;
Please see the EXECUTE IMMEDIATE reference documentation for the various supported syntax and Using the EXECUTE IMMEDIATE Statement in PL/SQL for some introduction material.