7 lines
222 B
SQL
7 lines
222 B
SQL
-- ROW 关键字生成一个元组
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SELECT ROW (1, 2, 3);
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-- pg_column_size函数获取存储数据需要的字节数
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SELECT pg_column_size(ROW (1,2,3)); -- 36
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SELECT pg_column_size(ROW (1::int2, 2::int2, 3::int2)); -- 30
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