Merge branch 'main' of https://github.com/datayoga-io/datayoga into a…

…dd_migrator_blocks_typo

docs/reference/blocks/relational_lookup.md

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+---
+parent: Blocks
+grand_parent: Reference
+---
+
+# relational\.write
+
+Lookup in a relational table
+
+
+**Properties**
+
+|Name|Type|Description|Required|
+|----|----|-----------|--------|
+|**condition**<br/>(The lookup condition)|`string`|Use any valid SQL syntax. Use the alias `lookup` for the lookup table and `incoming` for the base table<br/>|no|
+|**query**<br/>(Query string to use as an override to the built in query)|`string`|Use any valid SQL syntax. Use the alias `lookup` for the lookup table and `incoming` for the base table<br/>|no|
+|**schema**<br/>(The table schema of the lookup table)|`string`|If not specified, no specific schema will be used when connecting to the database.<br/>|no|
+|**table**<br/>(The lookup table name)|`string`|Lookup table name<br/>|no|
+|[**order\_by**](#order_by)<br/>(List of keys to use for ordering\. Applicable for multiple matches)|`array`||no|
+|[**fields**](#fields)<br/>(Columns to add to the output from the lookup table)|`array`||no|
+|**multiple\_match\_policy**|`string`|How to handle multiple matches in the lookup table<br/>Default: `""`<br/>Enum: `"first"`, `"last"`, `"all"`<br/>|no|
+
+**Additional Properties:** not allowed  
+**Example**
+
+```yaml
+id: load_snowflake
+type: relational.write
+properties:
+  connection: eu_datalake
+  table: employees
+  schema: dbo
+  load_strategy: APPEND
+
+```
+
+<a name="order_by"></a>
+## order\_by\[\]: List of keys to use for ordering\. Applicable for multiple matches
+
+**Items: name of column**
+
+**Item Type:** `string`  
+**Example**
+
+```yaml
+- country_name
+
+```
+
+<a name="fields"></a>
+## fields\[\]: Columns to add to the output from the lookup table
+
+**Items: name of column**
+
+**No properties.**
+
+**Example**
+
+```yaml
+- fname
+- lname: last_name
+- address
+- gender
+
+```
+
+