MySQL
Running MySQL in Docker With a Data Volume That Persists
Run MySQL 8.4 in Docker with a named volume, environment variables, a custom config, health checks, initialization scripts and safe upgrades.
6 min read
Topic
MySQL
The workhorse behind half the web. Queries, quirks and storage-engine lore for keeping it quick, correct and out of the pager.
MySQL
Installing MySQL 8.4 on macOS Linux and Windows Step by Step
Install MySQL 8.4 LTS on macOS, Ubuntu and Windows: package sources, first start, the root account, secure setup and checks that the server works.
6 min read
MySQLGuide
Getting a MySQL Server Running and Usable From Scratch
A beginner guide to getting a MySQL server running: choose a version, install, secure, connect, create users and fix the first errors.
16 min read
CSV
Converting CSV to SQL INSERT Statements the Safe Way
Generate INSERT statements from a CSV without breaking on O'Neil or running a DROP TABLE hidden in a value. Batches of 1,000 loaded 193,708 rows in 1.6 s.
13 min read
CSV
Writing Dates and Booleans to CSV That Others Can Read
One timestamp exported as 09:30+00, 16:30+07 and 04:30-05, and dd.mm.yyyy that pandas read as 3 January. Fix dates and booleans in the query, not the session.
9 min read
CSV
Exporting Large Tables to CSV Without Running Out of Memory
Export a 2,000,000 row table to CSV six ways: peak memory ranged from 11 MB to 2 GB, time from 1.6 s to 14 s. fetchall and pandas are the ones that run out.
9 min read
CSV
Exporting MySQL Query Results to CSV With INTO OUTFILE
INTO OUTFILE writes on the server and its popular recipe corrupts newlines and NULLs: 4 of 8 rows read back. A variant reads 7, a client script reads 8.
11 min read
CSVGuide
Exporting Query Results to CSV From Five Major Databases
The same eight awkward rows exported from PostgreSQL, MySQL, SQLite, DuckDB and MongoDB, then read back: four tools return all 8, one recipe returns 4.
25 min read
JSON
Choosing Between a JSON Column and a Document Database
When a JSON column in PostgreSQL, MySQL or SQLite is enough, and when a document database such as MongoDB earns its place, with measured numbers.
8 min read
JSON
Fixing Invalid JSON Text Errors in MySQL Inserts and Imports
Decode MySQL error 3140 Invalid JSON text and its relatives, including the backslash trap in SQL string literals that silently changes your JSON.
9 min read
JSON
Validating JSON Before It Gets Into a MySQL Column
Enforce structure on a MySQL JSON column with JSON_TYPE checks and JSON_SCHEMA_VALID in CHECK constraints, with the draft 4 limits and the insert cost.
8 min read
JSON
MySQL JSON Versus MariaDB JSON and the Differences
MariaDB's JSON is validated text and MySQL's is a binary type. What differs in storage, operators, indexes, errors and speed, measured on 200,000 rows.
8 min read
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