Practice SQL typing with JOINs, aggregation, CTEs and nested queries. Choose from 40 prepared queries and review aliases, quotes and punctuation without a database.
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Practice your own code · private to this tab
Use fictional or redacted English keyboard text. Paste is allowed here to prepare the source. It is disabled during practice. Code is copied, never executed. Limit: 1,200 characters. Tabs become four spaces. This source and its results stay in this tab, including when optional usage statistics are enabled. They do not save to your account or complete plan lessons. Reloading clears them.
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PROCESS ACCURACY—
Entry 1
Copy the source exactly.
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A SQL example before you start
Join customers and orders — copy the displayed source exactly, including whitespace. Scroll the sample horizontally if a line extends beyond the panel.
SELECT c.name, o.id, o.total
FROM customers AS c
INNER JOIN orders AS o
ON c.id = o.customer_id
WHERE o.total >= 50;
What to watch in SQL
Keep the displayed keywords, aliases and line breaks even when your database would accept another layout. This is transcription scoring, not query validation.
The deck includes joins, aggregation, a CTE and a ? parameter placeholder. Placeholder syntax varies by database driver; these examples are not a database-specific course.
40 prepared snippets in three levels
Choose Core syntax first, then Work tasks and Nested structures. Each untimed run contains eight snippets from the selected bank. All snippets mixes the three levels; keep the same level when comparing results.
Core syntax · 11 snippets
Select open orders
Count by status
Use a parameter placeholder
Select unique statuses
Read a limited result
Filter a total range
Find a missing email
Match a reference prefix
Choose several statuses
Name a fallback value
Calculate an average
Work tasks · 15 snippets
Summarize customer spending
Join customers and orders
Label order sizes
Find customers without orders
Summarize unpaid totals
Compare minimum and maximum
Read a daily order count
Count orders per customer
Filter a bound amount
Label missing contacts
Calculate line-style totals
Find duplicate contact emails
Read the latest timestamps
Count by condition
Trim a displayed name
Nested structures · 14 snippets
Use a common table expression
Find customers with orders
Rank orders by customer
Compare with a customer average
Use two common table expressions
Find a customer with no paid orders
Build a running total
Compare adjacent totals
Combine two status groups
Join an aggregated result
Number a limited work queue
Use a conditional average
Find the largest order ties
Partition a status summary
Prepared snippets rotate until the selected bank is exhausted. They are transcription exercises, not generated projects or a programming assessment.
WHO IT HELPS
Train a useful work skill.
For SQL learners and analysts practicing query transcription. Fictional customers and orders tables make it easier to follow aliases, column names and the boundaries between clauses.
How to practice
Read the table aliases and column names first. Copy one clause at a time, preserving the displayed keyword case and line breaks. In a JOIN or EXISTS query, check each alias prefix against its source before submitting with Ctrl/Command+Enter.
Common mistakes
Watch c.id versus o.id, commas between selected columns, single quotes around values and the final semicolon. Changing capitalization or query layout may be valid SQL but still differs from the source being scored.
Suggested training time
Start with 5–10 minutes. Take breaks and stop if typing causes discomfort. Accurate input comes before speed.
Common questions
How is exact-copy accuracy measured?
Every character, including case, spaces and line breaks, is compared with the source. WPM uses five characters per word. Compare the same language, duration and practice settings; this is not a programming assessment.
Do I need an account?
No. Practice, error review and current-result export are free without login. Sign in only if you want to save history.
Which queries are in the SQL practice set?
The 40 queries include SELECT with ordering, SUM with GROUP BY/HAVING, an INNER JOIN, counts by status, a CTE, a parameter placeholder, CASE and EXISTS. Core syntax, work tasks and nested structures use a fixed rotating bank. Queries follow SQLite-compatible syntax; this is not a live database task.
Is the question-mark placeholder valid in every SQL database?
No. The ? example follows SQLite-style binding and is also used by some other drivers. PostgreSQL-style $1 and named parameters are not part of that example. Copy the shown syntax; check your own driver documentation for production queries.
Can this check whether my query returns the right rows?
No database is connected and no query is executed. The report checks exact characters, including aliases, spaces and line breaks, rather than SQL semantics or result rows.