Tag: history

This post is how to work with Databricks SQL through a Notebook.

Create a Temp View of a DataFrame.

df = <SOMETHING>
df.createOrReplaceTempView("<TABLE_NAME>")

Drop a Table

%sql
drop table <SCHEMA>.<TABLE>;

Describe Table

%sql
desc table extended <SCHEMA>.<TABLE>;

Describe Detail

%sql
describe detail <SCHEMA>.<TABLE>;

Show Table Properties

%sql
SHOW TBLPROPERTIES <SCHEMA>.<TABLE>;

Describe History

%sql
describe history <SCHEMA>.<TABLE>;

Create Schema

%sql
CREATE SCHEMA IF NOT EXISTS <SCHEMA>;

Create Parquet Table

%sql
CREATE TABLE <SCHEMA>.<TABLE> USING PARQUET LOCATION 'abfss://<COTNAINER>@<STORAGE_ACCOUNT>.dfs.core.windows.net/<FOLDER>/'

Create Delta Table

%sql
CREATE TABLE <SCHEMA>.<TABLE> USING DELTA LOCATION 'abfss://<COTNAINER>@<STORAGE_ACCOUNT>.dfs.core.windows.net/<FOLDER>/'

Upsert

MERGE INTO schema.table t \
USING ( \
  SELECT columns \
  FROM table \
) AS source ON (source.column = t.column) \
WHEN NOT MATCHED THEN \
  INSERT ( \
    ( \
      column, column2 \
    ) \
  VALUES ( \
    source.column, source.column2 \
  ) \
WHEN MATCHED THEN \
  UPDATE SET \
    t.column = source.column \