Station_Filamp Columns

ColumnName	Domain	Datatype	NULL	Definition
sta		VARCHAR2(6)	NO	Station code. This is the common code-name of a seismic observatory. Generally only three or four characters are used
net		VARCHAR2(8)	NO	Unique network identifier. This character string is the name of a seismic network
filamp_nb		NUMBER(8, 0)	NO	This attribute represents the filter-amplifier number
ondate		DATE	NO	This attribute denotes the start date
filamp_id		NUMBER(8, 0)	NO	Filter-amplifier identifier. Each filter-amplifier is assigned a unique integer which identifies it in a database
nb_pchannel		NUMBER(8, 0)	NO	This attribute denotes the number of physical channels of a datalogger
offdate		DATE	YES	This attribute denotes the end date
lddate		DATE	YES	Load date. Date and time that the record was created or last modified, in Oracle date datatype

Station_Filamp Primary and Unique Keys

Key Name	Key Type	Keys
StFi00	PrimaryKey	sta, net, filamp_nb, ondate

Station_Filamp Foreign Keys

Parent Relationships:

Table Name	Type	Cardinality	Constraint Name	VerbPhrase	InversePhrase	Foreign Keys	Is Supertype	Deferrable	Initially Deferred
Filamp	Non-Identifying	One To Zero or More	Sta_Fil_Fil			filamp_id	NO	NO	NO
Station	Identifying	One To Zero or More	Sta_Fil_Sta			sta, net, ondate	NO	NO	NO

Child Relationships:

Table Name	Type	Cardinality	Constraint Name	VerbPhrase	InversePhrase	Foreign Keys	Is Subtype	Deferrable	Initially Deferred
Station_Filamp_PChannel	Identifying	One To Zero or More	Sta_Fil_PCh_Sta_Fil				NO	NO	NO

Station_Filamp Check Constraints

Check Constraint Name	CheckConstraint
StFi01	filamp_nb >= 1
StFi02	nb_pchannel >= 0