assign the interval

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is it possible to assign a data type of a table variable interval?
CREATE TABLE mytable
AS
   (SELECT '4' num_of_days FROM DUAL);

DECLARE
   myinteverval   INTERVAL DAY TO SECOND;
BEGIN
   myinterval := INTERVAL '4' DAY;  --happy

   SELECT num_of_days INTO myinteverval FROM mytable;

   myinteverval := interval myinteverval day; -- not happy
end;

Hello

Pollywog wrote:

BANNER
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
PL/SQL Release 11.2.0.3.0 - Production
CORE     11.2.0.3.0     Production
TNS for HPUX: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Production

is it possible to assign a data type of a table variable interval?

CREATE TABLE mytable
AS
(SELECT '4' num_of_days FROM DUAL);

DECLARE
myinteverval   INTERVAL DAY TO SECOND;
BEGIN
myinterval := INTERVAL '4' DAY;  --happy

What is the reason why he is happy

INTERVAL '4' DAY

a perfectly formed INTERVAL is literal. By itself

'4'

would be a VARCHAR2 interval, but is not in itself. immediately before the first quotation mark is the INTERVAL keyword, which means that the expression is a literal INTERVAL, and a literal INTERVAL must contain a certain number in single quotes; No matter what kind of expression.

SELECT num_of_days INTO myinteverval FROM mytable;

myinteverval := interval myinteverval day; -- not happy
end;

Use the NUMTODSINTERVAL function:

myinterval := NUMTODSINTERVAL (4, 'DAY');

Tags: Database

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