PostgreSQL select column names where there is no default value : SELECT column_name, column_default FROM information_schema.columns WHERE (table_schema, table_name) = ('public', 'test') AND column_default IS NULL ORDER BY ordinal_position;
ImageMagick Resize the width, adding a prefix to the same names in current directory under Windows 7: & 'C:\Program Files\ImageMagick-7.0.8-Q16\convert.exe' -strip -thumbnail '250x>' *.jpg -set filename:area "thumb-%t" ./%[filename:area].png Result: 1.jpg --> thumb-1.png 2.jpg --> thumb-2.png 3.jpg --> thumb-3.png 4.jpg --> thumb-4.png
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