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I have an existing table. I have a select query which might return multiple rows. I want to display all rows that this select query returns, without using cursor. How can I achieve it in pl sql?
If I understand your question correctly, the following is a possible solution:
BEGIN
FOR T IN (SELECT 'data_1' col_1,
'data_2' col_2,
'data_3' col_3
FROM dual) LOOP
dbms_output.put_line('Query returns: '||T.col_1||', '||T.col_2||', '||T.col_3);
END LOOP;
END;
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I am wondering whether I can create a column with dollar sign? The output should look like the area marked by red line. But the column can still be calculated like number.
I am not sure whether it is capable.
You can try this:
select to_char(500, '$999') from dual
Column-Name with Dollar:
CREATE TABLE t1 (ID int, "$Sal" int);
INSERT INTO t1 values(1,100);
SELECT id, "$Sal" * 10 FROM t1;
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DECLARE
CURSOR c_CUR IS
SELECT id, table_name, is_deleted FROM truncate_table WHERE IS_DELETED=1
ORDER BY id DESC;
BEGIN
FOR C IN c_CUR LOOP
EXECUTE IMMEDIATE 'TRUNCATE TABLE'|| C.table_name;
END LOOP;
END;
I HAVE AN ERROR TABLE OR CLUSTER KEYWORD IS MISSING
It is very clear that you are not creating a dynamic query properly. Space is missing between TABLE'|| C.table_name
It must be something like this:
EXECUTE IMMEDIATE 'TRUNCATE TABLE '|| C.table_name; -- see space after TABLE
Cheers!!
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i am trying to validate data inside my database that is number.
Am i able to detect the retrieved data whether it starts with 8 or 9?
For example:
8999999 is valid
9999999 is valid
7000000 is invalid
Thanks
You can try checking the first character of the field using SUBSTR():
SELECT field_value
FROM your_table
WHERE SUBSTR(TO_CHAR(field_value), 1, 1) IN ('8','9')
The following query will return all records where column data begins with an 8 or 9:
SELECT data
FROM your_table
WHERE REGEXP_LIKE (CAST(data AS varchar2(30)), '^(8|9)(*)');
I assume here that data is a numeric type, and so I cast it to varchar before using REGEXP_LIKE.
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On Oracle, how can I list ALL tables and ALL materialized views without indexes using a SELECT command ?
Well, normally I wouldn't do this, but here you go:
SELECT t.TABLE_NAME
FROM USER_TABLES t
LEFT OUTER JOIN (SELECT DISTINCT TABLE_NAME
FROM USER_INDEXES) i
ON i.TABLE_NAME = t.TABLE_NAME
WHERE i.TABLE_NAME IS NULL;
Perhaps your question should be "Why did someone just do my homework for me?".
Best of luck.
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select 'open' as "documentno" from c_order
union all
select documentno as "documentno" from c_invoice
.This is not working in oracle.
i need a query that works in both oracle and postgres
You have not provided enough information to answer your question.
My guess is that you want to include columns in a union that do not have the same data type and are looking for a way to cast a number to a character value (again I'm guessing because you didn't tell us what data type documentno is).
The following works in Oracle and Postgres:
select 'open' as "documentno" from c_order
union all
select cast(documentno as varchar(20)) as "documentno" from c_invoice;
However: the first part of the union does not make sense. Why are your retrieving the same constant value for each and every row in c_order without any additional information from that table?