Can we commit inside a trigger?
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What is a pdo connection?
What is difference between triggers and stored procedures. And advantages of SP over triggers ?
declare l1 number := null; l2 number :=null; begin if l1=l2 then message('equal'); else if l1<>l2 then message('not equal'); else message('else'); end if; end if; end; What will be the output ?
What is mutating error?
What is record data type?
what is the difference between ereg_replace() and eregi_replace()? : Sql dba
What is difference between pls_integer and integer?
SELECT emp_num, years, SUM(salary) FROM sales UNION ALL SELECT emp_id, SUM(takehomepay) FROM marketing What error is present in the sample code above? 1. Queries being combined with the UNION ALL statement are not allowed to have SELECT lists with a different number of expressions. 2. You are not allowed to use aggregate functions within two queries joined by a UNION ALL statement. 3. The UNION ALL statement incorrectly combines the "years" result from the first query with the "SUM (takehomepay)" result from the second query. 4. Unless the UNION ALL statement is replaced with a UNION statement, the queries will return duplicates. 5. The "emp_id" column from the second query must be renamed (or aliased) as "emp_num" so that it corresponds to the column name from the first query. Otherwise, the queries will not execute.
Where not exists in sql?
Explian rowid, rownum?
What is difference between my sql and sql?
Why plvtab is considered as the easiest way to access the pl/sql table?