ORA-00933: SQL command not properly ended when using execute immediate - plsql

Question

When I run
SELECT COUNT(*)
INTO l_entry_found
FROM hera.hera_user#iam
WHERE username = docm.eb_key;
without execute immediate it works.
execute immediate'
SELECT COUNT(*) INTO l_entry_found FROM hera.hera_user#iam WHERE
username = docm.eb_key;';
However throws an ora-00933.
What could be the Problem and how may i solve it? Thanks in advance!

Answer 1

you can't use select into in dynamic SQL
and you do not need a semicolon either
declare
l_entry number(10);
begin
execute immediate'
SELECT COUNT(*) FROM hera.hera_user#iam WHERE
username = '''||docm.eb_key||'''' INTO l_entry;
end;

Answer 2

You have some issues; say you have a table like
create table someTable(userName varchar2(100))
and a code like :
declare
someVariable varchar2(100);
l_entry_found number;
begin
someVariable := 'someName';
--
SELECT COUNT(*)
INTO l_entry_found
FROM someTable
WHERE username = someVariable;
end;
If you wat to switch to dynamic SQL, you need to
remove the semicolon
use bind variables to pass your parameter
move the INTO outside the dynamic part
Your code could be:
declare
someVariable varchar2(100);
l_entry_found number;
begin
someVariable := 'someName';
--
execute immediate
'SELECT COUNT(*)
FROM someTable
WHERE username = :bindVar'
into l_entry_found
using someVariable;
end;
Here I assume that you have a good reason to switch to dynamic SQL, for example, your table name could change based on some parameter; if not, plain SQL is good enough for your task.

Answer 3

The EXECUTE IMMEDIATE statement executes a dynamic SQL statement or anonymous PL/SQL block. You can use it to issue SQL statements that cannot be represented directly in PL/SQL, or to build up statements where you do not know all the table names, WHERE clauses, and so on in advance
Continuing with your question
-- Case using 1 output column 'COUNT(*)', 1 filter variable 'eb_key'
DECLARE
--
eb_key VARCHAR2(100) := 'something';
l_entry_found number;
--
BEGIN
execute immediate 'SELECT COUNT(*) FROM hera.hera_user#iam WHERE username = :eb_key;' USING eb_key INTO l_entry_found;
END;
-- Case using 2 output column 'COUNT(*)', 3 filter variable 'eb_key'
DECLARE
--
eb_column1 VARCHAR2(100) := 'something';
eb_column2 VARCHAR2(100) := 'something';
l_entry_found1 number;
l_entry_found2 number;
--
BEGIN
execute immediate 'SELECT column1, column2 FROM hera.hera_user#iam WHERE username = :eb_1 AND lastname = :eb_2;' USING eb_column1, eb_column2 INTO l_entry_found1,l_entry_found2;
END;