-- 1000,000 rows
CREATE TABLE cell (
  cell_id INTEGER PRIMARY KEY,
  met_cell_id INTEGER,
  8 other INTEGER or REAL columns
)

-- 38 rows
CREATE TABLE lc (
  lc_id INTEGER PRIMARY KEY,
  56 other INTEGER or REAL columns
)

-- 10 rows
CREATE TABLE dist (
  dist_id INTEGER PRIMARY KEY,
  37 other INTEGER or REAL columns
)

-- 2,920,000 rows
CREATE TABLE met (
  met_id INTEGER PRIMARY KEY,
  met_cell_id INTEGER,
  9 other INTEGER or REAL columns
)

CREATE TABLE cell_lc (cell_id INTEGER, lc_id INTEGER)
CREATE TABLE cell_dist (cell_id INTEGER, dist_id INTEGER)

CREATE INDEX idx_met_cell_id ON met (met_cell_id)
CREATE INDEX idx_cell_lc ON cell_lc (cell_id)
CREATE INDEX idx_cell_dist ON cell_dist (cell_id)