Individual skill
type-mapping-encyclopedia
RDBMS-to-RDBMS data type mapping tables, RDBMS-to-NoSQL conversion patterns, character set/collation conversion, and special type handling guide. Use this skill for requests involving 'type mapping', 'data type conversion', 'MySQL PostgreSQL conversion', 'Oracle migration', 'character set conversion', 'collation', 'AUTO_INCREMENT sequence', 'JSON type', etc. Enhances schema-mapper's type conversion capabilities. Note: ETL script writing and validation queries are outside the scope of this skill.
en/34-data-migration/.claude/skills/type-mapping-encyclopedia/skill.md
Source commit 8e8d35c6a19166614d1af1df85512266d51121ae
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- Last checked
- Nov 9, 2026
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- Mar 22, 2026
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# Type Mapping Encyclopedia — Data Type Mapping Reference
A comprehensive reference for RDBMS-to-RDBMS data type mapping, special type conversions, and character set handling.
## MySQL to PostgreSQL Mapping
| MySQL | PostgreSQL | Notes |
|-------|-----------|-------|
| TINYINT | SMALLINT | TINYINT UNSIGNED -> SMALLINT |
| INT | INTEGER | |
| INT UNSIGNED | BIGINT | PostgreSQL has no UNSIGNED |
| BIGINT | BIGINT | |
| FLOAT | REAL | |
| DOUBLE | DOUBLE PRECISION | |