Add a limit to the column definition on the database, such as VARCHAR(256), or wrap the table in a view which does the same. Use the "Default VARCHAR size (bytes)" field on the Advanced tab when connecting to Snowflake in Tableau Desktop. This was renamed from "Max VARCHAR size" in...
another surprising feature from Snowflake is support for row-level data manipulations, which makes it easier to handle delta data load. The basic idea is to load incrementally extracted data into an intermediate or temporary table and modify records in the final table with data in the ...
Athena constructs a synthetic column of type varchar that represents the partitioning scheme for the table to help the connector generate splits. The connector does not modify the actual table definition.To create this synthetic column and the partitions, Athena requires a primary key to be defined...
ALTERTABLEt1ALTERCOLUMNc1DROPNOTNULL;ALTERTABLEt1MODIFYc2DROPDEFAULT,c3SETDEFAULTseq5.nextval;ALTERTABLEt1ALTERc4SETDATATYPEVARCHAR(50),COLUMNc4DROPDEFAULT;ALTERTABLEt1ALTERc5COMMENT'50 character column';DESCTABLEt1;+---+---+---+---+---+---+---+---+---+---+| name | type | kind | ...
Filter data using WHERE clauses Join multiple tables Use aggregate functions Create and modify tables Remember to always size your warehouse appropriately for your queries. For learning purposes, an XS or S warehouse is usually sufficient. Key SQL operations to practice in Snowflake: CREATE TABLE ...
One-click open of grid data in native spreadsheet tool (Excel, Numbers, LibreOffice, etc) Yes No Copy column name Yes Yes Copy selection Yes Yes Quick filter with range options Yes No Quick filter highlights matched cells Yes No Aggregation data for selection Yes No...
As mentioned above, “pg_dump” is the utility for backing up a Postgres database or tables. It can also be used to extract data from the tables. Example syntax: pg_dump --column-inserts --data-only --table= <database> > table_name.sql Here, the output file “table_name.sql”...
Change column data type, default value, nullability, comment, or autoincrement. Add new columns to the end of the column list. Drop columns. Add, drop, or modify inline or out-of-line constraints. Add, drop, or modify clustering keys. For more information, see CREATE OR ALTER TABLE usage...
-- create a tag on an existing table’s columnalter table modify column <column_name> set tag <tag_key> = '<tag_value> ' [ , <tag_key> = '<tag_value>' , ... ];alter table modify column <column_name> unset <tag_key> [ , <tag_key> , ... ];-- view all available ...
The Legacy Connector will have “ODBC” followed by the version and the V2 connector will have “GO” followed by the version. To just check for the connections coming in from ODBC, you can filter on the client_application_id column. ...