The queries that will be formed by using each of the method is as specified below – Example #1 We will now see an example of how we can create this temporary table in a particular session by using all three syntaxes.
Let us try to create one temporary table named Educba_writers that contain 5 columns in it namely first_name, last_name, no_of_articles, experience_in_writing, joining_date respectively. The name of the schema in which the table is created cannot be specified as user is not allowed to see it and it is set internally by redshift as all the temporary tables are created in a specific schema of redshift.The data which is stored in tabular format inside the temp tables is not recoverable which means that once the session ends, the redshift system will internally drop the temporary table making it inaccessible further to anyone anywhere.
The tables that are created for temporary purpose cannot be visible to the other sessions or users as it will be only available in current session where it is created and used by only that user or users having access to that session and table.There are certain things that you should keep in mind while using the temp tables in Amazon redshift which are listed here – Where all the remaining parameters and the terminologies have the same meaning as mentioned for method 1. The syntax of creating the temporary table by using this method is as shown below –ĬREATE TABLE TEMP name of the table (name of the columns along with their data types) We can create a temporary table in redshift by simply prefixing the name of the table in create table command with a keyword temp. You can specify the names of columns and also what type of values will be stored in it inside the parenthesis. The name of the table can be any valid table name which you want your temporary table to be called. The use of hash symbol for creating a temporary table can be done by using the below syntax –ĬREATE TABLE #name of the table (name of the columns along with their data types) The syntax of all the three methods is as given below – This are the use of hash symbol (#) before the name of the temporary table, specifying the keyword TEMP before the name of the table, and specifying the TEMPORARY keyword before the name of the table. There are three ways by using which we can create a temp table in redshift.
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