DATA_SCALEDecimal數字中小數點右邊的位數。 DATA_TYPEString引數的資料型別。 UniqueKeys ColumnNameDataType描述 OWNERString條件約束定義的擁有人。 CONSTRAINT_NAMEString條件約束定義的名稱。 TABLE_NAMEString與具有條件約束定義之資料表 (或檢視表) 相關的名稱。
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4.2 NCLOB 数据类型 它存储UNICODE类型的数据,支持固定宽度和可变宽度的字符集,NCLOB对象可以存储最多(4 gigabytes-1) * (database block size)大小的文本数据。 4.3 BLOB 数据类型 它存储非结构化的二进制数据大对象,它可以被认为是没有字符集语义的比特流,一般是图像、声音、视频等文件。BLOB对象最多存储(4 gi...
When computing systems and associated databases grow, they need to “scale” to a larger size. There are two dimensions to this growth: Handling Progressively Larger DATABASES Handling Progressively Larger WORKLOADS Scaling for larger amounts of data req
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column NUMBER( precision, scale ) The precision of the datatype is the total number of significant digits in the number. You can designate a precision for a number as any number of digits up to 38. If no value is declared for precision, Oracle will use a precision of 38. The scale re...
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NumericScale System.Int16 列のスケール。 この列には、Oracle NUMBER、Oracle INTERVAL DAY TO SECONDおよびOracle TIMESTAMP列に対する有効な値が含まれています。その他すべての列については、値はnullです。 IsUnique System.Boolean 列値が一意かどうかを示します。 実表の2行にこの列の同じ...
2022-04-25 09:11:02.946 [0-0-0-reader] INFO CommonRdbmsReader$Task - Get response ResultSet cost 2987 ms with Sql: [select OWNER,TABLE_NAME,COLUMN_NAME,DATA_TYPE,DATA_TYPE_MOD,DATA_TYPE_OWNER,DATA_LENGTH,DATA_PRECISION,DATA_SCALE,NULLABLE,COLUMN_ID,DEFAULT_LENGTH,DATA_DEFAULT,NUM_DISTINC...