CURRVAL and NEXTVAL → pseudocolumns: CURRVAL: returns the current value of a sequence NEXTVAL: increments the sequence and … returns the next value You must qualify CURRVAL and NEXTVAL with the name of the sequence … NEXTVAL in: The SELECT list of a SELECT statement that is not contained in a subquery, materialized view … NEXTVAL in
ORA-08003 sequence string .NEXTVAL exceeds internal limits → NEXTVAL cannot be made because it exceeds the legal representation size. Action: Alter or re-create the sequence number with legal limits.
ORA-08004 sequence string .NEXTVAL string string VALUE and cannot be instantiated → Cause: Instantiating NEXTVAL would violate one of MAX/MINVALUE. Action: Alter the sequence so that a new value can be requested.
Pseudocolumns → these pseudocolumns: CURRVAL and NEXTVAL LEVEL ROWID ROWNUM XMLDATA
ORA-08002 sequence string .CURRVAL is not yet defined in this session → Cause: Sequence CURRVAL has been selected before sequence NEXTVAL. Action: Select NEXTVAL from the sequence before selecting CURRVAL.
Managing Sequences → NEXTVAL pseudocolumns Oracle9i Application Developer's Guide - Fundamentals for information about using sequences in applications
SQL Pseudocolumns → , NEXTVAL, ROWID, and ROWNUM. Pseudocolumns are not actual columns in a table but they behave like … procedural statements. CURRVAL and NEXTVAL A sequence is a schema object that generates sequential … use NEXTVAL to generate a number. A reference to NEXTVAL stores the current sequence number in … CURRVAL. NEXTVAL
Using Sequences → sequence is referenced in SQL statements with the NEXTVAL and CURRVAL pseudocolumns; each new sequence … number is generated by a reference to the sequence's pseudocolumn NEXTVAL, while the current sequence … number can be repeatedly referenced using the pseudo-column CURRVAL. NEXTVAL and CURRVAL are not … , INSERT s, or UPDATE
CREATE SEQUENCE → the CURRVAL pseudocolumn (which returns the current value of the sequence) or the NEXTVAL … information on using the CURRVAL and NEXTVAL \"How to Use Sequence Values\" for information on using
N → NCLOB datatype, 3-10 NEW correlation name, 15-16 new features, xxix NEXTVAL pseudo-column, 2-25
Function Internal Datatype → specified sequence. Before you can reference CURRVAL, you must use NEXTVAL to generate a sequence number.
Semantics → change the INCREMENT BY value before the first invocation of NEXTVAL, some sequence numbers will be
Types of DML Changes Captured → sequence values are not captured. For example, if a user references a NEXTVAL or sets the sequence, then a
PL/SQL Reserved Words → BEGIN COUNT DESC FROM PL/SQL Reserved Words (continued): FUNCTION NEW RELEASE SUM GENERIC NEXTVAL REMR
Oracle Reserved Words → MAXEXTENTS MIN MINUS MLSLABEL MOD MODE MODIFY NATURAL NATURALN NETWORK NEW NEXTVAL NOAUDIT NOCOMPRESS
N → New Datetime Datatypes, A-2 NEXTVAL pseudocolumns, 4-12 nibbles, 4-52 NIST NIST compliance, xxxi
Internal Datatypes → return specific data items: Pseudocolumn Corresponding Internal Datatype Code NEXTVAL NUMBER 2
ORA-02287 sequence number not allowed here → Cause: The specified sequence number reference, CURRVAL or NEXTVAL, is inappropriate at this point
External Datatypes → START WITH clause, you specify a condition that identifies the root of the tree. NEXTVAL returns the … commit or rollback the transaction. A reference to NEXTVAL stores the current sequence number in CURRVAL