snowflake temp table

snowflake temp table
snowflake temp table

A Snowflake Temp Table is a great way to store data. This type of structure is especially useful in cases where there may be many concurrent users accessing the same data at the same time. A Snowflake Temp Table is similar to a RDBMS Temporary Table (SQL Server) or a SQLite MEMORY TABLE (SQL Lite). It is used to efficiently store large amounts of data temporarily for retrieval and analysis purposes without having to rely upon disk space.  In this tutorial we will discuss:  What makes a SnowFlakeTempTable different from a normal temporary table?  Why is a SnowFlakeTemp Table useful?  How does one create a SnowFlakeTemp table?  How does one query a SnowFlakeTemptable?  How does one drop a SnowflakeTemp Table?  

  1. Temp Tables

 Temporary tables are used to store temporary data while developing queries against that data. A temp table is a special kind of table created to hold temporary data. Temporary tables are often represented in SQL statements using the keyword “temp” followed by the name of the table.

  1. Table Name Conventions

 When naming tables, it is best practice to follow conventions. There are many different conventions when naming tables but here are three common ones.  A a. First letter capitalization - This convention is similar to English language names. So, if you were thinking of calling your table ‘A’ then you would call it ‘Temp_A’. Using this method helps maintain consistency across your database.

  1. Underscore prefixes - This convention is based on programming languages. So, if you wanted to create a table named ‘Foo’, you would name it ‘foo_bar’. Using this approach means that any new tables will be consistent with existing tables. It also makes it easier to identify which table belongs to which schema.

  Create Temp Table in Snowflake  In this tutorial, we will learn how to create temporary tables in the Snowflake database. Temporary table is used to store data temporarily and then drop them after certain time period. We will create ‘temp_table’ in our snowflake database using SQL query.  What is a Temporary Table?  A temporary table is nothing but a virtual table created for executing queries. It disappears after the execution of query.  How to Create Temporary Table in Snowflake Database?  To create a temporary table, we first need to execute CREATE TEMPORARY TABLE statement. Then we can perform operations on the table. To view a list of existing temporary tables, we can run the SHOW TEMP TABLES command from SQL prompt.  SQL Server  Snowflake  

  1. Create Table As Select

 The create table as select statement creates a temporary table based on the result set of another query. This allows you to manipulate data without affecting any existing tables. You may want to use this statement if you want to create a table with a different schema from the original query. To create a temporary table using the create table as select statement, follow the below steps - 

  1. First, run the following SQL command for the original query.

 CREATE TABLE AS SELECT * FROM original query;

  1. Then, use the CREATE TEMPORARY TABLE syntax to create a temporary table.

 CREATE TEMPORARY DATABASE mytempdb;  USE mytempdb;  CREATE TABLE AS SELECT * FROM newtable;  

  1. Create temporary tables in Snowflake

Snowflake provides a simple way to create temporary tables - they are automatically dropped when the session ends. This means that any data created in the table remains only until the next time the database connection is closed. Temporary tables give users the flexibility to work with large datasets without incurring additional costs of storing their data permanently. CREATE TABLE Temp_Table AS SELECT 1 as Col1; SELECT * FROM Temp_Table; DROP TABLE Temp_Table; The above query will create a temporary table with only one column named “Col1” which contains a single value ‘1’. As soon as we execute this query, Snowflake creates a temp table with the name “Temp_Table”, then selects any data from this temp table and drops the temp table.