SQL data types define the type of value that can be stored in a table column. For example, if you want a column to store only integer values, you can define its data type as INT. SQL data types can be broadly divided into the following categories. Numeric data types such as: INT, ...
A data type is a set of representable values. Every representable value belongs to at least one data type and some belong to several data types. SQL supports three sorts of data types: predefined data types, constructed types, and user-defined types. Predefined data types are sometimes called ...
SET(val1, val2, val3, ...)A string object that can have 0 or more values, chosen from a list of possible values. You can list up to 64 values in a SET list Numeric Data Types Data typeDescription BIT(size)A bit-value type. The number of bits per value is specified insize. Th...
DESCRIBE DATABASE DESCRIBE FUNCTION 描述位置 DESCRIBE PROVIDER DESCRIBE QUERY DESCRIBE RECIPIENT DESCRIBE SCHEMA DESCRIBE SHARE DESCRIBE TABLE DESCRIBE VOLUME LIST SHOW ALL IN SHARE SHOW CATALOGS SHOW COLUMNS SHOW CONNECTIONS SHOW CREATE TABLE SHOW CREDENTIALS SHOW DATABASES SHOW FUNCTIONS SHOW GROUPS 顯示位...
結構 型別結構 (StructType) list 或 Tuple StructType(fields)。 field 是 StructField 的 Seq。 (4) StructField 此欄位資料類型的實值型別 (例如,StructField 的 Int 資料類型為 IntegerType) StructField(name, dataType, [nullable])。(4) 變體 VariantType VariantVal VariantType() 物件 不支援...
List 元素的追加方式1-在列表的最后增加数据方式2-在列表的最前面增加数据 方式3-在列表的最后增加数据 示例代码如下: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 object ListDemo01 { def main(args: Array[String]): Unit = { // 说明 // 1. 在默认情况下 List 是 scala.collection.immuta...
SQL20034NThe data typelist-type-nameis not included in a structured data type hierarchy that includes the data typeleft-type-nameof the left operand of the TYPE predicate. Explanation All the data types listed in the TYPE predicate must be included in a data type hierarchy that includes the ...
DDL(Data Defination Language):数据库定义语言 建表: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 CREATE[EXTERNAL]TABLE[IFNOTEXISTS]table_name[(col_name data_type[COMMENTcol_comment],...)][COMMENTtable_comment][PARTITIONEDBY(col_name data_type[COMMENTcol_comment],...)][CLUSTEREDBY(col_...
PL/SQL Number Types Number types let you store numeric data (integers, real numbers, and floating-point numbers), represent quantities, and do calculations. BINARY_INTEGER You use the BINARY_INTEGER datatype to store signed integers. Its magnitude range is -2**31 .. 2**31. BINARY_INTEGER...
Figure 1. Built-in data types supported byDb2 for z/OS NULLS All data types include the null value. Distinct from all nonnull values, the null value is a special value that denotes the absence of a (nonnull) value. Although all data types include the null value, some sources of values...