What Are Pseudo-columns? How Can You Use Pseudo Columns In Procedural

1.	What Are Pseudo-columns? How Can You Use Pseudo Columns In Procedural Statements?
Answer» PSEUDO columns are not ACTUAL columns in a table but they behave like columns. They are used in SQL statements to retrieve SPECIFIC INFORMATION. PL/SQL recognizes pseudo-columns as a part of SQL statements but they cannot be used directly in a procedural language. The following pseudo-columns are used in SQL: ROWID ROWNUM LEVEL CURRVAL NEXTVAL Pseudo columns are not actual columns in a table but they behave like columns. They are used in SQL statements to retrieve specific information. PL/SQL recognizes pseudo-columns as a part of SQL statements but they cannot be used directly in a procedural language. The following pseudo-columns are used in SQL:

What Are Pseudo-columns? How Can You Use Pseudo Columns In Procedural Statements?

Answer»

PSEUDO columns are not ACTUAL columns in a table but they behave like columns. They are used in SQL statements to retrieve SPECIFIC INFORMATION. PL/SQL recognizes pseudo-columns as a part of SQL statements but they cannot be used directly in a procedural language. The following pseudo-columns are used in SQL:

ROWID
ROWNUM
LEVEL
CURRVAL
NEXTVAL

Pseudo columns are not actual columns in a table but they behave like columns. They are used in SQL statements to retrieve specific information. PL/SQL recognizes pseudo-columns as a part of SQL statements but they cannot be used directly in a procedural language. The following pseudo-columns are used in SQL:

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