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0 = CHAR
1 = SMALLINT 2 = INTEGE R 3 = FLOAT 4 = SMALLFLOAT 5 = DECIMAL 6 = SERIAL * 7 = DATE 8 = MONEY 9 = NULL 10 = DATETIME 11 = BYTE 12 = TEXT 13 = VARCHAR 14 = INTERVAL 15 = NCHAR 16 = NVARCHAR 17 = INT8 18 = SERIAL8 * 19 = SET 20 = MULTISET 21 = LIST 22 = Unnamed ROW 40 = Variable-length opaque type (LVARCHAR) 4118 = Named ROW如果，某字段要求非空，则在原数字上加256，
如：某字段coltype=262,那么,262-256=6，该字段就应该为：SERIAL not NULL 类型！本文转自BlogJavaOo缘来是你oO的博客，原文链接：，如需转载请自行联系原博主。