Station_Digitizer

Logical Entity Name | Station_Digitizer
Default Table Name | Station_Digitizer
Definition | Data associating a station with a digitizer

Station_Digitizer Attributes

Attribute/Logical Rolename | Domain | Datatype | NULL | Definition
sta |  | VARCHAR(6) | NO | Station code. This is the common code-name of a seismic observatory. Generally only three or four characters are used
net |  | VARCHAR(8) | NO | Unique network identifier. This character string is the name of a seismic network
digi_nb |  | NUMERIC(8, 0) | NO | This attribute represents the digitizer number
ondate |  | DATE | NO | This attribute denotes the start date
serial_nb |  | VARCHAR(80) | NO | This attribute denotes a serial number of a datalogger board
nb_pri_pchannel |  | NUMERIC(8, 0) | NO | This attribute denotes the number of primary physical channels of a digitizer
nb_aux_pchannel |  | NUMERIC(8, 0) | NO | This attribute denotes the number of auxiliary physical channels of a digitizer
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_Digitizer Keys

Key Name | Key Type | Keys
StDi00 | PrimaryKey | sta, net, digi_nb, ondate

Station_Digitizer Relationships

Parent Relationships:

Entity Name | Type | Cardinality | Business Name | VerbPhrase | InversePhrase | Foreign Keys | Is Supertype
Station | Identifying | One To Zero or More |  |  |  | sta, net, ondate | NO

Child Relationships:

Entity Name | Type | Cardinality | Business Name | VerbPhrase | InversePhrase | Foreign Keys | Is Subtype
Datalogger_Board | Non-Specific |  |  |  |  |  | NO
Station_Digitizer_PChannel | Identifying | One To Zero or More |  |  |  |  | NO

Station_Digitizer Check Constraints

Check Constraint Name | CheckConstraint
StDi01 | digi_nb >= 1
StDi02 | nb_aux_pchannel >= 0
StDi03 | nb_pri_pchannel >= 0