What type of SQL statement must you use execute immediate?
dynamic SQL statement
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.
Can we use execute immediate for insert statement?
You can use the RETURNING BULK COLLECT INTO clause with the EXECUTE IMMEDIATE statement to store the results of an INSERT , UPDATE , or DELETE statement in a set of collections.
What is a MERGE statement?
The MERGE statement in SQL is a very popular clause that can handle inserts, updates, and deletes all in a single transaction without having to write separate logic for each of these. You can specify conditions on which you expect the MERGE statement to insert, update, or delete, etc.
Is MERGE statement in Oracle performance?
The Oracle “merge” statement combines an insert and update which is why it’s also called an “upsert”. At a high level the merge statement simplifies the syntax, which is essentially a simple “insert, if already exists, update”.
Why We Use execute immediate?
EXECUTE IMMEDIATE enables execution of a DML or DDL statement which is held as a string and only evaluated at runtime. This enables one to dynamically create the statement based on program logic. EXECUTE IMMEDIATE is also the only way you can execute DDL within a PL/SQL block.
What type of SQL statement must you use execute immediate Mcq?
EXECUTE IMMEDIATE command can be used to call DDL statements.
Can we use SELECT statement in execute immediate in Oracle?
Can we use any SQL statement with Execute Immediate? Any SQL statement or PL/SQL block which returns single row of results can be used with Execute Immediate.
How do you pass a bind variable in execute immediate?
So here we will see how to update values of a table using bind variables in Native Dynamic SQL.
- Step 1: Prepare a table.
- Step 2: Insert some data.
- Step 3: Write the dynamic SQL program.
- Applying USING Clause Of Execute Immediate Statement.
What is MERGE statement in Oracle with example?
An Oracle MERGE statement is used to pull data from the source table(s) and update or insert into the target table based on condition. Merge statement allows us to make condition-based insert or update into a target table. It is introduced in Oracle 9i version and it supports 9i or later version. It is a DML statement.
Is MERGE into faster than UPDATE?
The UPDATE statement will most likely be more efficient than a MERGE if the all you are doing is updating rows. Given the complex nature of the MERGE command’s match condition, it can result in more overhead to process the source and target rows.