Snowflake

Database Migration to Snowflake: Best Practices and Tips

The Snowflake cloud data warehouse has become widely recognized as a flexible, high-performing, and scalable solution for both data warehousing and analytics needs. This article will explore how to migrate a database to Snowflake cloud data warehouse and also provide insights into some best practices for the migration. Page Content Introduction Preparing for Migration Migrating to Snowflake Best Practices for Database Migration to Snowflake Best Practices for File Sizing and Format Best Practices for Data Transfer Best Practices for Running Source and Snowflake Databases Best Practices for Temporary and Transient…

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April 20, 2023
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How to Create Synonym in Snowflake?

Synonyms in relational databases allows you to create easily names for long table, view names, or any other objects such as sequence, procedure, function, materialized view. Databases such as Netezza, Oracle support creating and managing synonyms. The synonyms provide an alternate way of referencing tables or views that present in the current or other databases. The Snowflake database does not support creating synonym yet. In this article, we will check an alternate method similar to create synonym in Snowflake. How to Create Synonym in Snowflake? The Snowflake cloud database does…

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December 5, 2022
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Rows Affected by Last Snowflake SQL Query – Example

Many modern databases such as Teradata, SQL Server, etc. support system variables to get rows affected by the last DML command. Then the row count is used to make certain decision to continue execution or abort it. Snowflake scripting provides system variables that hold the information of records affected by an INSERT, UPDATE or DELETE queries in the current session. In this article, we will check how to get rows affected by last Snowflake SQL Query. Rows Affected by Last Snowflake DML Statement Rows Affected by Last Snowflake SQL Query After each DML command is…

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November 16, 2022
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Blocks in Snowflake Scripting – Examples

Snowflake scripting allows you to write procedural code within the Snowflake scripting block. In this article, we will check how to use blocks in a Snowflake scripting. Blocks in Snowflake Scripting Blocks in Snowflake Scripting Block in a Snowflake scripting is defined by a keywords such as DECLARE, BEGIN, EXCEPTION and END. You usually write your procedural code into different part. Structure of Block in a Snowflake Scripting Snowflake scripting block has the following basic structure: DECLARE ... variable declarations, ... ... cursor declarations, etc ... BEGIN ... Snowflake Scripting…

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November 9, 2022
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Snowflake Scripting Cursor Syntax and Examples

In my other article, we have discussed Snowflake scripting control structures and loops to manipulate Snowflake data. In this article, let us discuss how to define and use the Snowflake scripting cursor within a stored procedure and anonymous block. Snowflake also support JavaScript to write stored procedures, but it does not support cursor when JavaScript used. You can use the JavaScript result as a cursor alternative. Page Content Introduction Understanding Cursors in Snowflake How use Cursors in Snowflake Scripting? Declaring Cursors Opening Cursors Fetching Data from Cursors Closing Cursors Snowflake…

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October 4, 2022
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Snowflake Scripting Control Structures – IF, WHILE, FOR, REPEAT, LOOP

In my other Snowflake article, we have checked how JavaScript control structure works in Snowflake JavaScript stored procedures. In this article, we will check Snowflake scripting control structures such as IF, WHILE, FOR, REPEAT and LOOP. Snowflake Scripting Control Structures Snowflake Scripting Control Structures The best part about Snowflake is it supports both SQL and JavaScript as a programming language to write stored procedures and user defined functions. Till now, it was supported only JavaScript to write stored procedures, but now they started supporting Snowflake script much similar to PL/SQL…

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September 21, 2022
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Oracle DML LOG ERROR Alternative in Snowflake

Oracle database supports many user friendly error handling features that make the developer's life easier when working on DML statements such as INSERT, UPDATE, DELETE, MERGE. One of the such features is dml error logging. Using this feature, your DML statements will continue by logging errors in the error table created using the DBMS_ERRLOG package. This feature is not yet available in Snowflake. In this article, we will check Oracle DML LOG ERROR alternative methods in Snowflake scripting. Oracle DML Error Logging With Oracle DML error logging feature, you can…

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August 29, 2022
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How to Get Most Queried Table in Snowflake? Query

Snowflake is a fully managed cloud data warehouse solution. It is fast, reliable and comes with near zero management. Similar to many relational databases such as AWS Redshift, Azure Synapse, Snowflake support many system tables and views. Snowflake system tables store more rich and important information such as table usage, records count, constraint details, etc. In this article, we will check How to get most queried table in Snowflake using system tables present in the information schema. How to Get Most Queried Table in Snowflake? Snowflake maintains the important information…

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August 12, 2021
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Snowflake NULL Handling Functions, Usage and Examples

A NULL value in a relational database is a special marker used in SQL to indicate that a data value is UNKNOWN or does not exist in the database. In other words, a NULL value is just a placeholder to denote values that are missing or it is unknown. Snowflake supports NULL handling functions that are available in other cloud data warehouse such as Redshift, Azure Synapse, etc. Along with those, Snowflake also supports many extended functions to handle null values. In this article, we will check Snowflake NULL handling functions, usage and some examples. Snowflake NULL…

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August 3, 2021
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How to Create View Dynamically in Snowflake?

The best part about Snowflake is that it supports almost all features that are available in any modern data warehouse. One of such a feature is dynamic SQL. You can execute SQL statements dynamically using Snowflake stored procedures. Snowflake supports JavaScript API to write stored procedures and user-defined functions. Note that, there is a difference between Snowflake stored procedure and UDFs. We will use stored procedures to create a view dynamically in Snowflake. Create View Dynamically in Snowflake In a data warehouse application, you will always get requirement to write…

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July 30, 2021