snapshot of https://github.com/sqlc-dev/sqlc.git (main, 2026-09-16; blobs > 131072B omitted)

docs/howto/update.md

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+# Updating rows
+
+```sql
+CREATE TABLE authors (
+  id         SERIAL PRIMARY KEY,
+  bio        text   NOT NULL
+);
+```
+
+## Single parameter
+
+If your query has a single parameter, your Go method will also have a single
+parameter.
+
+The parameter syntax varies by database engine:
+
+**PostgreSQL:**
+```sql
+-- name: UpdateAuthorBios :exec
+UPDATE authors SET bio = $1;
+```
+
+**MySQL and SQLite:**
+```sql
+-- name: UpdateAuthorBios :exec
+UPDATE authors SET bio = ?;
+```
+
+```go
+package db
+
+import (
+	"context"
+	"database/sql"
+)
+
+type DBTX interface {
+	ExecContext(context.Context, string, ...any) (sql.Result, error)
+}
+
+func New(db DBTX) *Queries {
+	return &Queries{db: db}
+}
+
+type Queries struct {
+	db DBTX
+}
+
+const updateAuthorBios = `-- name: UpdateAuthorBios :exec
+UPDATE authors SET bio = $1
+`
+
+func (q *Queries) UpdateAuthorBios(ctx context.Context, bio string) error {
+	_, err := q.db.ExecContext(ctx, updateAuthorBios, bio)
+	return err
+}
+```
+
+## Multiple parameters
+
+If your query has more than one parameter, your Go method will accept a
+`Params` struct.
+
+**PostgreSQL:**
+```sql
+-- name: UpdateAuthor :exec
+UPDATE authors SET bio = $2
+WHERE id = $1;
+```
+
+**MySQL and SQLite:**
+```sql
+-- name: UpdateAuthor :exec
+UPDATE authors SET bio = ?
+WHERE id = ?;
+```
+
+Note: For MySQL and SQLite, parameters are bound in the order they appear in the query, regardless of the order in the function signature.
+
+```go
+package db
+
+import (
+	"context"
+	"database/sql"
+)
+
+type DBTX interface {
+	ExecContext(context.Context, string, ...any) (sql.Result, error)
+}
+
+func New(db DBTX) *Queries {
+	return &Queries{db: db}
+}
+
+type Queries struct {
+	db DBTX
+}
+
+const updateAuthor = `-- name: UpdateAuthor :exec
+UPDATE authors SET bio = $2
+WHERE id = $1
+`
+
+type UpdateAuthorParams struct {
+	ID  int32
+	Bio string
+}
+
+func (q *Queries) UpdateAuthor(ctx context.Context, arg UpdateAuthorParams) error {
+	_, err := q.db.ExecContext(ctx, updateAuthor, arg.ID, arg.Bio)
+	return err
+}
+```
+