SQLite 查询插入记录如果不存在 [英] SQLite Query to Insert a record If not exists

问题描述

如果实际上未插入，我想将记录插入到 sqlite 表中.

I want to insert a record into a sqlite table if its actually not inserted.

假设它有三个字段pk、name、address

Let's say it has three fields pk, name, address

如果之前没有添加名称，我想插入带有名称的新记录.

I want to INSERT new record with name if that name not added preveously.

我们可以在单个查询中完成此操作吗?有时似乎与 SQL 查询略有不同.

Can we do with this in a single Query. Seems like its slightly different from SQL Queries sometimes.

推荐答案

是的，您可以通过一个查询来做到这一点.

Yes, you can do that with a single query.

INSERT ON CONFLICT IGNORE 应该可以帮助您:http://www.sqlite.org/lang_conflict.html

在名称上放置一个唯一键，如果名称已存在，这将在您尝试插入记录时产生冲突.

Put a unique key on the name, this will create a conflict when you try inserting a record if the name already exists.

默认是ABORT，所以如果没有IGNORE，语句会返回错误.如果您不想这样做，请使用 IGNORE.

The default is ABORT, so without the IGNORE, the statement will return an error. If you don't want that, use IGNORE.

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