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Drizzle · SQLite · all subjects

query-api

252 notes in this subject, read out of this brain and free to use. This is page 5 of 5.

undefined values ignored in update set, use null to set null

Values of `undefined` in the object passed to `.set()` are ignored. To set a column to `null`, pass `null` explicitly.

passing SQL expressions to update set

You can pass SQL expressions as values in the `.set()` object using the `sql` template tag. For example: `db.update(users).set({ updatedAt: sql`NOW()` }).where(eq(users.name, "Dan"))`

update query with limit clause

Use `.limit()` to add a `limit` clause to an update query. Example: `db.update(usersTable).set({ verified: true }).limit(2)` generates `update "users" set "verified" = ? limit ?`.

update query with orderBy clause

Use `.orderBy()` to add an `order by` clause to an update query. You can sort by single or multiple fields and use `asc()` or `desc()` for direction. Examples: `.orderBy(usersTable.name)` or `.orderBy(desc(usersTable.name))` or `.orderBy(asc(usersTable.name), desc(usersTable.name2))`.

update query returning clause in SQLite

You can update a row and get it back in SQLite using `.returning()`. Example: `db.update(users).set({ name: "Mr. Dan" }).where(eq(users.name, "Dan")).returning({ updatedId: users.id })` returns the updated row as `{ updatedId: number | null }[]`.

CTEs with update queries using with clause

Common table expressions (CTEs) can be used with update queries to simplify complex queries by splitting them into smaller subqueries. Use `db.$with('name').as()` to define a CTE and then `.with()` to use it in an update statement. Example creates an average_price CTE and uses it in an update where clause.

update from clause for joining tables

SQLite supports UPDATE-FROM syntax which allows an UPDATE statement to be driven by other tables in the database. The target table is joined against other tables to help compute which rows need updating and what new values should be. Use `.from()` to specify joined tables in an update query.

update from returning columns from joined tables

In SQLite, you can return columns from tables joined via UPDATE-FROM. Example: `db.update(users).set({ cityId: cities.id }).from(cities).returning({ id: users.id, cityName: cities.name })` returns columns from both the updated table and the joined table.

update from with table alias

You can alias tables that are joined in an UPDATE-FROM statement using the `alias()` function. Example: `const c = alias(cities, 'c'); db.update(users).set({ cityId: c.id }).from(c)` generates `update "users" set "city_id" = "c"."id" from "cities" "c"`.

getTableColumns deprecated, use getColumns instead

The `getTableColumns()` function has been deprecated. Use `getColumns()` instead. Import from 'drizzle-orm'.

JIT Mappers available as opt-in feature in v1

JIT (just-in-time) compiled row mappers are now available as an opt-in feature. Enable with `const db = drizzle({ ..., jit: true });`. These mappers make mapping as fast as the raw driver.

Relational Queries v1 removed, replace with defineRelations()

RQBv1 has been removed in v1. Use the new Relational Queries v2 API with `defineRelations()` instead. The new system is built around defining relations with the `defineRelations()` function imported from 'drizzle-orm', using `r.many` and `r.one` to define relationships between tables.

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