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int update(array $values) Update a record in the database.

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$this inRandomOrder(string $seed = '') Put the query's results in random

bool chunkById(int $count, callable $callback, string $column = 'id', string $alias = null)

$this where(string|array|Closure $column, string $operator = null, mixed $value = null, string $boolean

mixed avg(string $column) Retrieve the average of the values of a given

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Collection pluck(string $column, string|null $key = null)