SQL Format Full Guide: beautification, dialects and security

1. Beautification, compression, verification of what each solves

There are at least three things that you say about "collating SQL" that you can do with tools and different goals.

Key borders: Regular formatting should not reword the name, listing, volume and operation; It serves the eyes with diff. If you rely on notes to explain business rules, you can back up before compression - this page 'compression' will strip the notes and fold the blanks.

Back-to-back (same logic, only blanks and keyword styles):

-- MinifyFront（On purpose.挤Yes.One.Okay.）
select u.id,u.name from users u left join orders o on u.id=o.user_id where o.amount>100 order by o.created_at desc;

-- BeautifyBack（示Meaning，IndentandLine Break依OptionsAnd...定）
SELECT
  u.id,
  u.name
FROM
  users u
  LEFT JOIN orders o ON u.id = o.user_id
WHERE
  o.amount > 100
ORDER BY
  o.created_at DESC;

2. dialects are not decorations: why first?

SQL has a common skeleton, but the identifier references, function names, page breaks, Booleans and parts of the keywords vary from engine to engine. Thousands of tools based sql-formatter, page provides:

What happens when you pick the wrong dialect?

• Formatting device error in `not knowing' a paragraph of the syntax. Page hint formatting failed.
• Results can still be obtained, but the line-replacement is odd or the dialect-specific keywords are treated as normal identifiers.
• Team specifications require that when a key is uppercase, a identifier is lowercase, you have to rely on the "keycase" option, rather than using a hard-on in another dialect.

Recommendation: Whatever the engine of production is chosen; Cross-cub migration scripts can be used to look at the public part first, in SQL, and then run in each of the target dialects, comparing the differences.

3. What do the parameters on the tool control?

Open /tools/dev/sql-formatter, the toolbars are approximately left to right:

1. - The dialect is down. • See table above.
2. Indent Numbers 0～8Default 2； Control the width of the space indentation (achievement of the tabWidth, do not use Tab characters.
3. Keyword Case — Keep as / Keyword Upper / Keyword Lowercase. The choice of "maintain" does not force the restatement of keywords.
4. Format - Call the library to aestheticize the full text of the current editor.
5. Minify - Go to comment + Blank Collapse (see note below).
6. Copy / Clear - Clipboard and reset.

Processing done in browsers; CDN-dependent load sql-formatter The library. Formatting offline or intercepting CDNs is not available - it's an environmental issue, not a "SQL is wrong".

4. Phased operation

1. Opens the toolbar. Enter SQL Format, confirm that the editing area and toolbar are visible.
2. The dialect. Selecting on a real database; Try running with SQL when you're not sure, then cutting to the specific dialect.
3. Sets indentation and keyword styles. Alignment with team norms (e.g., keyword capital, indent 2).
4. Paste SQL. (a) One or more paragraphs at a time; The super-script can be intercepted and the problem sub-inquiries can be glorified.
5. Dot "Formatation". The editing area becomes multiline structure when successful and there is a hint of "formatization success"; Error message on window belt when failure.
6. The idea is to "compress" the time line. (b) Confirm that the comments are no longer required; The result can be copied to a log or a single line configuration.
7. Copy that. Photo by "Choose" If you want to compare the JSON configuration or interface, you can open a separate one. JSON Format。

Capacity boundaries (relative to real pages)

• Support: Multi-speech, indent width, keyword case, simple compression, copy empty.
• Do not declare: Execute SQL, connect databases, explain implementation plans, auto-recover syntax errors, complete storage process IDE.
• Compressed side effects: It's going to get out. -- Line Comment and / / (a) Block comments; "Closed" is not considered to be a no-loss round trip.

5. Common failures and treatment

Wrong order

1. Complete SQL (with log time stamp, or ORM prefix).
2. Whether quotation marks are paired to brackets.
3. The dialect is consistent with the target engine.
4. Whether the mispointed compression resulted in the loss of the comment.
5. The first time I saw the news, I was told that I was going to go to the office and I was going to go to the office and I was going to go to the office and I was going to go to the office and I was going to go to the office and I was going to go to the office and I was going to go to the office and I was going to go to the office and I was going to talk to the office.

6. Real work scene

Scene A: Slowly query a line of monsters in the log

Copy single line SQL from MySQL slow log or APM, post tools, dialect choice MySQL, keyword capital. See if the JOIN order and the WEREE can downgrade the index condition before deciding whether to overwrite the index. It is easier to reproduce a beautiful version of the worksheet than to make a lump sum of the screenshot.

scene B: Code Review does not match

Some people are all underwritten and some people are mixed up in Tab. Have agreed that "Put this tool before submitting: PostgreSQL + Indent 2 + Keyword Capital" and Review will focus on semantics and indexes and will not argue with spaces. Note: Formatting cannot replace SQL Review (prohibited) SELECT *The government has been able to provide the information on the situation in the country.

C: Migration MySQL → PostgreSQL

The same business statement is formatted on both sides, with the eye contrasting function and page break. Formatting does not automatically rewrite LIMIT Yes FETCH, but this allows for alignment of the difference paragraphs and facilitates the preparation of the migration list.

Script D:BI from the "Runable" script

The report tool exports a frequently-segregated aliases and nests. Presume first, mark sub-Quest that can be filtered down, and then give it to the silos for rewriting. Compression is only used to " confirm whether the same sentence is taken after the blanks have been removed" and not as a delivery format.

Scene E: Teaching to demonstrate dangerous writing

UseFiction name and false dataShows the flute, the calcium, the leak connection condition. Do not include a real customer chart structure, ID number, mobile phone number in the public domain.

scene F: Link to JSON/ Configure

Interfaces are sent with JSON dynamic SQL clips (not recommended but reality exists): First put JSON in JSON Format , and then you will post the SQL field value to this tool. Two paragraphs of the tool division to avoid a box of syntax.

7. Safety and privacy: production of SQLs not just generic texts

Formatting tools make statements easier to read and make statements easier to readSensitive information is more visible.。 Default assumptions before pasting: The screen may be recorded, history may be synchronized, public computer clipboard is not credible.

Principle:

• Prefer to the test library to construct the equivalent SQL, formatted sharing.
• Locally trusted machines must be reproduced in production form + with empty editing areas and clipboard.
• Thousands of cells are processed in browsers, which does not mean that "you can simply paste the main library dump".
• Do not submit formatted production statements to a public Issue or group file.

8. How to select the tools

Selection tips:To read SQL formatting with SQL; To read JSON with JSON tools; (a) Decoding the layer of code first; Implementation and permissions are always done on the side of the database.

9. Team landing recommendations

• The document is aligned with the example SQL in Wiki with the set of options (the dialect + indent + keyword).
• PR template adds a sentence to the sentence "Add/modify SQL to the format later".
• Slow query duty manual: paste pre-sensitization check forms (remainable library name, PII required).
• The difference between "formatization style" and "Query performance": beautiful full-watch scans are still slow to search.
• Storage process, dynamic SQL spell if formatted failed, downsizes the static segment first, and then processes the string fusion layer.

After turning the "show and debate" into a habit, SQL collaborated to move back from aesthetic arguments to terms, indices and data volumes.

FAQ

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One.No sensitive dataThe query goes through the "select the dialect formatted copy" and then dissensitizes when processing real slow queries. You can also return the list of guides to continue browsing.