{"id":3584,"date":"2026-10-27T15:34:15","date_gmt":"2026-10-27T07:34:15","guid":{"rendered":"http:\/\/www.ylevacase.com\/blog\/?p=3584"},"modified":"2026-10-27T15:34:15","modified_gmt":"2026-10-27T07:34:15","slug":"what-is-a-temporary-table-and-how-to-create-one-in-sql-4ef6-7ec5af","status":"publish","type":"post","link":"http:\/\/www.ylevacase.com\/blog\/2026\/10\/27\/what-is-a-temporary-table-and-how-to-create-one-in-sql-4ef6-7ec5af\/","title":{"rendered":"What is a temporary table and how to create one in SQL?"},"content":{"rendered":"

When I first started selling tables, most of my conversations with businesses weren\u2019t just about wood finishes or leg designs\u2014they were about the temporary space people need when setting up for events, accommodating out-of-town teams, or testing a layout before a permanent installation. That\u2019s the same energy I bring to explaining temporary tables in SQL: they\u2019re a flexible, temporary solution for data teams, built to solve immediate problems without the long-term commitment of a standard database table. Table<\/a><\/p>\n

<\/p>\n

If you\u2019re new to SQL, you might already know that a standard table stores permanent data in your database, tied to a specific schema and often updated regularly. A temporary table is different: it exists only for a short duration, designed to hold a specific set of data that\u2019s needed for a single session, a single query chain, or a routine task. In my line of work, a temporary table is like a folding event table\u2014you set it up exactly where you need it, use it for a few hours (or days, depending on the job), then take it down when you\u2019re done. It doesn\u2019t clutter your permanent storage, and it\u2019s tailored to a specific purpose, whether that\u2019s holding guest names for a wedding, workstations for a pop-up shop, or datasets for a data analyst to run a report.<\/p>\n

Let\u2019s break down why temporary tables matter, because that\u2019s what I spend time walking through with every new client. First, they reduce strain on the main database. Think of a permanent database as your kitchen\u2019s main dining table\u2014you use it for daily meals, but you don\u2019t want a temporary buffet setup sitting there for a week, blocking regular use. Temporary tables let data teams isolate messy, one-off data pulls without bogging down the main system. If a team needs to clean a dataset, run a complex join across multiple large tables, or calculate rolling numbers for a weekly sales report, they can store that intermediate result in a temporary table instead of modifying permanent data or running the same heavy calculation repeatedly on the main table.<\/p>\n

Second, temporary tables are session-specific. That means if I set up a temporary table in SQL for my own session, it won\u2019t interfere with the temporary tables someone else creates while working on the same database. It\u2019s like each sales rep at my company getting their own temporary event table when they meet with a client\u2014no one has to share space, and no one accidentally takes someone else\u2019s supplies. Once the session ends, that temporary table is automatically deleted, so you don\u2019t have to remember to clean up. Some databases even let you set an expiration, so if a task takes a little longer than expected, the table doesn\u2019t stick around longer than needed.<\/p>\n

Third, they\u2019re customizable. Just like how I can build a temporary table with a round top for a small cocktail party or a long rectangular one for a corporate meeting, SQL temporary tables can be structured to fit exactly the data you need. You can define columns, data types, and indexes\u2014so if you\u2019re sorting a large dataset, you can add an index to your temporary table to speed up the sort, without adding that index to any permanent tables.<\/p>\n

Now, let\u2019s get into creating one, because that\u2019s the part my customers (both table buyers and new SQL users) usually ask about. The process varies a little depending on which database system you\u2019re using\u2014MySQL, PostgreSQL, SQL Server, and SQLite all have small differences, just like how a folding table for a wedding works a little differently than one for a trade show. I\u2019ll walk through the most common ones, with real examples that I\u2019ve seen teams use day to day.<\/p>\n

First, let\u2019s start with MySQL and SQL Server, since those are the two most common for small to mid-sized businesses. In MySQL, you create a temporary table using the CREATE TEMPORARY TABLE<\/code> statement. The syntax is straightforward: you define the table name, columns, and data types, just like a permanent table, but you add the TEMPORARY<\/code> keyword to tell the database this one\u2019s temporary. For example, if my sales team needs to track customer orders from a recent pop-up shop (a temporary event, so it fits the analogy), they might create a temporary table to hold those orders before merging them into the permanent sales table. The code would look like this:
\nCREATE TEMPORARY TABLE pop_up_orders (
\norder_id INT,
\ncustomer_name VARCHAR(100),
\nproduct_id INT,
\norder_date DATE
\n);
\nThat\u2019s it. This table will exist for the entire session\u2014so as long as the database connection stays open, that table is there. Once the team disconnects, it\u2019s gone automatically. If they need to add data to it after creating, they can use an INSERT INTO<\/code> statement, just like a permanent table:
\nINSERT INTO pop_up_orders (order_id, customer_name, product_id, order_date)
\nVALUES (1, ‘Maria Garcia’, 47, ‘2024-05-12’),
\n(2, ‘James Lee’, 22, ‘2024-05-12’),
\n(3, ‘Akira Tanaka’, 19, ‘2024-05-13’);<\/p>\n

SQL Server works almost the same way\u2014same CREATE TEMPORARY TABLE<\/code> syntax, though SQL Server also uses a shorthand with a single #<\/code> before the table name, like #pop_up_orders<\/code>. That\u2019s a handy trick I learned: in SQL Server, a table name starting with #<\/code> is automatically a temporary table, scoped to your current session. If you wanted to use that shorthand, the code would be:
\nCREATE TABLE #pop_up_orders (
\norder_id INT,
\ncustomer_name VARCHAR(100),
\nproduct_id INT,
\norder_date DATE
\n);
\nIt does the same job, and the cleanup is automatic when your session ends.<\/p>\n

Now, PostgreSQL is a little different. In PostgreSQL, you still use the CREATE TEMPORARY TABLE<\/code> keyword, but it has an extra feature: you can create a temporary table that\u2019s only visible to your current session, or if you use CREATE TEMPORARY TABLE IF NOT EXISTS<\/code>, it won\u2019t throw an error if the table already exists (super useful for testing). Here\u2019s an example for PostgreSQL, again using that pop-up order data:
\nCREATE TEMPORARY TABLE IF NOT EXISTS pop_up_orders (
\norder_id INT,
\ncustomer_name VARCHAR(100),
\nproduct_id INT,
\norder_date DATE,
\ntotal_amount DECIMAL(10,2)
\n);
\nPostgreSQL also lets you specify ON COMMIT<\/code> options, which tells the database what to do with the table when a transaction ends. For example, if you\u2019re running a series of transactions to build your temporary data, you can set ON COMMIT DELETE ROWS<\/code> so the table keeps its structure but clears the data after each transaction, or ON COMMIT DROP<\/code> to delete the entire table when the transaction ends. That\u2019s like being able to fold up the table after each meeting at an event, instead of waiting until the whole day is done\u2014super flexible for long tasks.<\/p>\n

SQLite is the simplest for small projects, like a local team building a quick report. In SQLite, you use CREATE TEMP TABLE<\/code> (short for CREATE TEMPORARY TABLE<\/code>) and it creates the table in a separate temporary database that\u2019s deleted when the connection closes. Here\u2019s a quick example, for a small caf\u00e9\u2019s temporary table of weekend sales:
\nCREATE TEMP TABLE weekend_sales (
\nitem_name TEXT,
\nsales_count INT
\n);
\nINSERT INTO weekend_sales VALUES (‘Latte’, 120), (‘Croissant’, 45), (‘Muffin’, 30);
\nThat\u2019s all you need for a quick, one-off analysis without messing with the main caf\u00e9 sales database.<\/p>\n

Now, a few best practices I\u2019ve picked up from both selling tables and working with SQL teams\u2014these are the things that keep your temporary tables useful, not a headache. First, don\u2019t overuse them. Just like I wouldn\u2019t use a temporary folding table for a family\u2019s daily dinner (that\u2019s what a permanent dining table is for), don\u2019t use a temporary table to store data you need long-term. If your table needs to stay around for months or years, it\u2019s a permanent table, and you should create it that way. Temporary tables are for short-term, task-specific use only.<\/p>\n

Second, clean them up. Even though most databases delete temporary tables automatically when your session ends, sometimes if a query fails or your connection drops abruptly, the table might stick around, taking up tiny bits of space. It\u2019s good practice to explicitly drop the table when you\u2019re done, just like I\u2019d fold up a event table and return it to storage after a party instead of leaving it set up. To drop a temporary table, just use DROP TEMPORARY TABLE<\/code> followed by the table name:
\nDROP TEMPORARY TABLE pop_up_orders;
\nThat\u2019s quick, and it ensures you don\u2019t leave any unnecessary objects cluttering your database.<\/p>\n

Third, be careful with large temporary tables. If you\u2019re working with a dataset that\u2019s millions of rows, temporary tables are great, but make sure your database has enough storage for them. It\u2019s like how a 10-foot folding table is perfect for a big wedding, but you don\u2019t try to squeeze that same table into a small apartment\u2014match the size of your temporary table to the space you have. If you run into space issues, check your database\u2019s temporary storage limits, or consider a different method, like a common table expression (CTE) for smaller datasets, but remember that CTEs only exist for one query, while temporary tables can be used across multiple steps in a longer task.<\/p>\n

Let\u2019s circle back to my table business, because that\u2019s where this all makes sense. A lot of the same logic applies: temporary solutions are designed to fill a gap without disrupting your permanent setup. When a client comes to me needing tables for a 3-day product launch, I don\u2019t sell them a permanent dining set\u2014they need a temporary solution that\u2019s easy to set up, take down, and store after the event. Similarly, when a data team needs to process a one-time dataset, a temporary table is that flexible, task-specific tool that doesn\u2019t clog up their main system.<\/p>\n

<\/p>\n

If your team is looking for reliable, flexible table solutions\u2014whether that\u2019s permanent desks for your office, temporary event tables for a pop-up, or modular setups that fit any space\u2014we can work together to find what you need. We build tables for every use case, with durable materials that stand up to regular setup and takedown, just like how temporary tables in SQL are built to handle the demands of one-off tasks without breaking.<\/p>\n

Dining Chair<\/a> For more information about how temporary tables work for your data needs, or to discuss table solutions for your next project, feel free to reach out to our team.<\/p>\n

<\/p>\n

    \n
  1. MySQL Documentation. "CREATE TEMPORARY TABLE Syntax."<\/li>\n
  2. PostgreSQL Documentation. "Temporary Tables."<\/li>\n
  3. SQL Server Documentation. "Create Temporary Tables (Database Engine)."<\/li>\n
  4. SQLite Documentation. "CREATE TEMPORARY TABLE."<\/li>\n<\/ol>\n
    \n

    Hangzhou Olay Furniture Co., Ltd.<\/a>
    Hangzhou Olay Furniture Co., Ltd. is one of the most professional table manufacturers and suppliers in China, also supports customized service. With abundant experience, we warmly welcome you to wholesale durable table made in China here from our factory.
    Address: Room 905, Unit 2, Building 3, Three Dimensional Wisdom Center, No.959 Gaoge Road, Wuchang Subdistrict, Yuhang District, Hangzhou City, Zhejiang Province, China
    E-mail: Info@hzolayfurniture.com
    WebSite:     https:\/\/www.hzolayfurniture.com\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

    When I first started selling tables, most of my conversations with businesses weren\u2019t just about wood … What is a temporary table and how to create one in SQL?<\/span>Read more<\/a><\/p>\n","protected":false},"author":733,"featured_media":3584,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[3547],"class_list":["post-3584","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry","tag-table-4a02-81d71a"],"_links":{"self":[{"href":"http:\/\/www.ylevacase.com\/blog\/wp-json\/wp\/v2\/posts\/3584","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.ylevacase.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.ylevacase.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.ylevacase.com\/blog\/wp-json\/wp\/v2\/users\/733"}],"replies":[{"embeddable":true,"href":"http:\/\/www.ylevacase.com\/blog\/wp-json\/wp\/v2\/comments?post=3584"}],"version-history":[{"count":0,"href":"http:\/\/www.ylevacase.com\/blog\/wp-json\/wp\/v2\/posts\/3584\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.ylevacase.com\/blog\/wp-json\/wp\/v2\/posts\/3584"}],"wp:attachment":[{"href":"http:\/\/www.ylevacase.com\/blog\/wp-json\/wp\/v2\/media?parent=3584"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.ylevacase.com\/blog\/wp-json\/wp\/v2\/categories?post=3584"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.ylevacase.com\/blog\/wp-json\/wp\/v2\/tags?post=3584"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}