Find null values from table and replace it with space - sqlite

问题

I am having sqlite database.

In some columns I am having null values.

I want to replace null values with space..

Is there any query for this?

Please let me know

回答1:

Use IFNULL. In a query:

SELECT IFNULL(mycolumn, ' ') FROM mytable

Or to change the data in the table:

UPDATE mytable SET mycolumn = IFNULL(mycolumn, ' ')

Alternatively:

UPDATE mytable SET mycolumn = ' ' WHERE mycolumn IS NULL

来源：https://stackoverflow.com/questions/12585560/find-null-values-from-table-and-replace-it-with-space-sqlite