CREATE TABLE fixture_item (
    id integer PRIMARY KEY,
    name text NOT NULL
);

INSERT INTO fixture_item (id, name) VALUES (1, 'one'), (2, 'two');

CREATE TABLE grid_parent (
    id integer PRIMARY KEY,
    name text NOT NULL
);
INSERT INTO grid_parent (id, name) VALUES (1, 'alpha'), (2, 'beta'), (3, 'gamma');

CREATE TABLE grid_child (
    id integer PRIMARY KEY,
    parent_id integer,
    note text
);
INSERT INTO grid_child (id, parent_id, note) VALUES (10, 1, 'c1'), (11, 2, 'c2'), (12, 3, 'c3');

CREATE TABLE grid_composite (
    a integer,
    b integer,
    val text,
    PRIMARY KEY (a, b)
);
INSERT INTO grid_composite (a, b, val) VALUES (1, 1, 'x'), (1, 2, 'y'), (2, 1, 'z');

CREATE TABLE grid_nopk (
    x integer,
    y text
);
INSERT INTO grid_nopk (x, y) VALUES (1, 'a'), (2, 'b');