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如果在其中一个列中存在空值,我将如何组合这两列?SQLite选择两列作为一个为空
SELECT (column1 || " " || column2) AS expr1 FROM your_table;
我想输出是:
如果在其中一个列中存在空值,我将如何组合这两列?SQLite选择两列作为一个为空
SELECT (column1 || " " || column2) AS expr1 FROM your_table;
我想输出是:
SELECT (COALESCE(column1,'') || " " || COALESCE(column2, '')) AS expr1 FROM your_table;
完美,谢谢! – adayzdone 2012-04-03 12:56:00