What Is Mutating Table

Q

What Is Mutating Table?

✍: fyicenter.com

A

Mutating Table is a table that is currently being modified by an Insert, Update or Delete statement.

Constraining Table is a table that a triggering statement might need to read either directly for a SQL statement or indirectly for a declarative Referential Integrity constraints.

Pseudo Columns behaves like a column in a table but are not actually stored in the table. E.g. Currval, Nextval, Rowid, Rownum, Level etc.

2007-04-15, 5452👍, 0💬

What Is Integrity?
What Is Integrity? Several points about data integrity: Assures database data and structures reflects all changes made to them in the correct sequence. Locks ensure data integrity and maximum concurrent access to data. Commit statement releases all locks. Types of locks are given below. Data Locks p... 2007-04-15, 5682👍, 0💬

What Is SQL*Loader
What Is SQL*Loader? SQL*Loader is a product for moving data in external files into tables in an Oracle database. To load data from external files into an Oracle database, two types of input must be provided to SQL*Loader: the data itself and the control file. The control file describes the data to b... 2007-04-15, 5537👍, 0💬

What Is Mutating Table
What Is Mutating Table? Mutating Table is a table that is currently being modified by an Insert, Update or Delete statement. Constraining Table is a table that a triggering statement might need to read either directly for a SQL statement or indirectly for a declarative Referential Integrity constrai... 2007-04-15, 5453👍, 0💬

What Is Consistency
What Is Consistency? Consistency : Assures users that the data they are changing or viewing is not changed until the are through with it. 2007-04-15, 5411👍, 0💬

What Is a Savepoint
What Is a Savepoint? Savepoint is a point within a particular transaction to which you may rollback without rolling back the entire transaction. 2007-04-15, 5188👍, 0💬

What Is Locking
What Is Locking? Locking are mechanisms intended to prevent destructive interaction between users accessing data. Locks are used to achieve. 2007-04-15, 5128👍, 0💬

When to Use SELECT INTO Statements
When to Use SELECT INTO Statements? The SELECT INTO Statement is most often used to create backup copies of tables or for archiving records. SELECT column_name(s) INTO newtable [IN externaldatabase] FROM source SELECT column_name(s) INTO newtable [IN externaldatabase] FROM source WHERE column_name o... 2007-04-15, 5122👍, 0💬

What Are DDL Statements
What are the most important DDL statements in SQL? CREATE TABLE - creates a new database table ALTER TABLE - alters (changes) a database table DROP TABLE - deletes a database table CREATE INDEX - creates an index (search key) DROP INDEX - deletes an index 2007-04-15, 5119👍, 0💬

Operators used in SELECT statements
Name some operators used in SELECT statements = Equal or != Not equal > Greater than = Greater than or equal <= Less than or equal BETWEEN Between an inclusive range LIKE Search for a pattern 2007-04-15, 5065👍, 0💬

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