My schema includes three tables and psql throws an error I'm not seeing
when I try to read the schema into the database. I'd appreciate fresh eyes
looking at the table and learning what error I'm not seeing.
The tables:
CREATE TABLE Weather (
site_id INTEGER PRIMARY KEY,
site_name TEXT,
site_location TEXT
);
CREATE TABLE Weather_Params (
site_id INTEGER
REFERENCES Weather(site_id),
param TEXT,
param_unit TEXT,
freq INTEGER,
freq_unit TEXT,
equip TEXT,
PRIMARY KEY (site_id, param)
);
CREATE TABLE Weather_Data (
site_id INTEGER
REFERENCES Weather(site_id),
monit_date DATE,
monit_time TIME,
read_by TEXT, -- name of employee collecting data
param TEXT
REFERENCES Weather_Params(param),
param_value REAL,
PRIMARY KEY (site_id, monit_date, monit_time, param)
);
The error:
ERROR: there is no unique constraint matching given keys for referenced
table "weather_params".
TIA,
Rich
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