backend_sql {dplyr} | R Documentation |
These generics are used to run build various SQL queries. Default methods
are provided for DBIConnection
, but variations in SQL across
databases means that it's likely that a backend will require at least a
few methods.
sql_select(con, select, from, where = NULL, group_by = NULL, having = NULL, order_by = NULL, limit = NULL, offset = NULL, ...) sql_subquery(con, sql, name = random_table_name(), ...) sql_join(con, x, y, type = "inner", by = NULL, ...) sql_semi_join(con, x, y, anti = FALSE, by = NULL, ...) sql_set_op(con, x, y, method) sql_escape_string(con, x) sql_escape_ident(con, x)
con |
A database connection. |
An SQL string.