April 2026
Beginner
493 pages
23h 2m
English
Content preview from SQL
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6.6 Common Pitfalls of Transaction Control Language
Before we conclude this chapter, it’s useful to highlight some pitfalls of TCL that you should avoid as much as possible.
Ignoring and avoiding TCL is an obvious pitfall. Some sample cases are as follows:
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Not using COMMIT or ROLLBACK despite modifying rows of multiple related tables
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Ignoring ROLLBACK on errors
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Not locking rows or tables before applying changes
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Not using transaction isolation in critical queries
However, abusing TCL to a point where other transactions are affected is another pitfall. Some sample cases are as follows:
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Locking more rows than necessary
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Keeping locks active for too long
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Using unnecessarily restrictive or too flexible transaction isolation modes ...
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