Purple: Types of fields
Фото: Yiannis Kourtoglou / Reuters
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트럼프, 결국 ‘대리 지상전’…쿠르드 반군 “美요청에 이란 공격”
If it’s hard to break the circular dependency, it might be a sign that two or more modules should be merged.
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CREATE TABLE test (id INTEGER PRIMARY KEY, name TEXT, value REAL);the column id becomes an alias for the internal rowid — the B-tree key itself. A query like WHERE id = 5 resolves to a direct B-tree search and scales O(log n). (I already wrote a TLDR piece about how B-trees work here.) The SQLite query planner documentation states: “the time required to look up the desired row is proportional to logN rather than being proportional to N as in a full table scan.” This is not an optimization. It is a fundamental design decision in SQLite’s query optimizer:。电影对此有专业解读
Possible-Shoulder940