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How to create trigger subquery in SQL-Oracle?
CREATE OR REPLACE TRIGGER trigger_w_subquery AFTER UPDATE OR INSERT ON project_archiving FOR EACH ROW WHEN (old.archiving_status <> new.archiving_status AND new.archiving_status = 1 AND (SELECT offer FROM projects WHERE projnum = :new.projnum) IS NULL ) BEGIN INSERT INTO offer_log (offer, status, date) VALUES (null, 9, sysdate); END;
How to create trigger for auto update modified date?
It would be nice to know how to create a trigger that auto-updates the modifiedDate column in my SQL Server table: An example for update ModDate would be nice. Thanks for contributing an answer to Stack Overflow!
How to create Trigger Check _ date on booking _ details?
CREATE TRIGGER check_date ON Booking_Details FOR UPDATE, INSERT AS IF (UPDATE (Date_To) OR UPDATE (Date_From)) BEGIN DECLARE @Date_From DATE, @Date_To DATE SET @Date_From= (SELECT Date_From FROM Booking_Details) SET @Date_To= (SELECT Date_To FROM Booking_Details) IF (@Date_From>@Date_To) BEGIN PRINT “Date To must larger than Date From” END END
When does a subquery return more than one value?
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression. There are several flaws…
Can a subquery be used in a SELECT statement?
A SELECT statement, following the same format and rules as any other SELECT statement. It must be enclosed in parentheses. You can use a subquery instead of an expression in the field list of a SELECT statement or in a WHERE or HAVING clause.
What is a subquery in Microsoft Access SQL?
SQL subqueries (Microsoft Access SQL) A subquery is a SELECT statement nested inside a SELECT, SELECT…INTO, INSERT…INTO, DELETE, or UPDATE statement or inside another subquery.
How to show the results of a query?
The query runs, and the query results show a list of orders that were processed by employees who are not sales representatives. There are several SQL keywords that you can use with a subquery: