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In Sqlite3, Write-Ahead-Logging mode allows one process to read a table, while another is writing to it. It doesn't say anything about one process writing and another deleting/updating.

Is this possible in Sqlite3?

  • Are you asking about 2 or more processes changing data in the same table, at the same time? – Oreo Feb 7 '18 at 13:49
  • Yes it may occur at the same time. But, It probably cannot be achieved as the sqlite3 docs says. The one way is handle the lock state and trying again. – Renatho Azevedo Feb 7 '18 at 14:29
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A DELETE and/or an UPDATE are both writes!

Only one process can write at any one time - that is an INSERT, an UPDATE or a DELETE at the same time. You can SELECT with as many processes as you like, but only one of the others at a time!

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