db_xor() Returns a new DatabaseCondition, set to "XOR" all conditions together. Return
db_drop_unique_key($table, $name) Drops a unique key. Parameters
db_drop_field($table, $field) Drops a field. Parameters
db_drop_index($table, $name) Drops an index. Parameters
db_field_exists($table, $field) Checks if a column exists in the given table.
db_add_primary_key($table, $fields) Adds a primary key to a database table. Parameters
db_add_field($table, $field, $spec, $keys_new = array()) Adds a new field to a table.
db_set_active($key = 'default') Sets a new active database. Parameters
db_drop_table($table) Drops a table. Parameters
db_query_range($query, $from, $count, array $args = array(), array $options = array()) Executes a query against
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