ERD
+ Entity
Relationship
r
● REL MODE — click source entity
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BIGINT
BIGSERIAL
BOOLEAN
BYTEA
DATE
DECIMAL
DOUBLE PRECISION
FLOAT
INT
INTEGER
JSONB
JSON
NUMERIC
REAL
SERIAL
SMALLINT
TEXT
TIMESTAMP
TIMESTAMPTZ
UUID
VARCHAR(255)
—
PK
FK
UK
Select cardinality
1 → N (one-to-many)
1 → 1 (one-to-one)
0|1 → N (optional-to-many)
N → N (many-to-many)