* [`KQL`](../../functions-operators/search-functions.md#esql-kql)
* [`MATCH`](../../functions-operators/search-functions.md#esql-match)
* [`MATCH_PHRASE`](../../functions-operators/search-functions.md#esql-match_phrase)
* [`QSTR`](../../functions-operators/search-functions.md#esql-qstr)
% * {applies_to}`stack: preview` {applies_to}`serverless: preview` [`DECAY`](../../functions-operators/search-functions.md#esql-decay)
% * {applies_to}`stack: preview` {applies_to}`serverless: preview` [`TERM`](../../functions-operators/search-functions.md#esql-term)