如何通过PL / SQL中的变量动态插入？

Question

Lets create a table first

create table test
(
  id number,
  name varchar2(20)
);

Now during insert, I want to hold the data into variable first & then dynamically pass the variable into the VALUES clause like this:

declare
  v_data varchar2(50);
begin
  v_data:='1,sunny';
  execute immediate 'insert into test values(v_data)';
  commit;
end;

But its showing some errors(Not enough values)...... plz help how to achieve this??

Answer 1

Table test has two columns. You're only inserting one and not naming which column it is hence "not enough values". So you need:

INSERT INTO test (name) VALUES (data)

or probably better is to put in an ID:

INSERT INTO test (id, name) VALUES (1, data)

or simply:

INSERT INTO test VALUES (1, data)

For this kind of thing though I would use a cursor rather than dynamic SQL (or even inline SQL).

Answer 2

You need to use different variables for each value

declare 
  v_data1 number
  v_data2 varchar2(50);
begin 
  v_data1 :=1
  v_data2 = 'sunny'; 

  insert into test values(v_data1,v_data2);
  -- Alternatively insert into test (Name) values (v_data2);
commit; 
end;

Answer 3

The normal way to pass values into dynamic SQL statements is with bind variables like this:

declare 
   v_id integer;
   v_name varchar2(50);
begin
   v_id := 1;
   v_name := 'sunny';
   execute immediate
      'insert into test (id, name) values(:b1, :b2)'
      using v_id, v_name; 
   commit; 
end;

That needs one variable per value.

Answer 4

Your approach works, but you need to adjust your query a little:

execute immediate 'insert into test values(' || v_data|| ')';

so that the contents of your v_data variable are actually inserted into the string, not the value "v_data" itself.