select cast(cast_int_to_string as string), cast(cast_String_to_int as int), cast(case_string_to_timestamp as timestamp), cast(case_timestamp_to_date

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select cast(cast_int_to_string as string), cast(cast_String_to_int as int), cast(case_string_to_timestamp as timestamp), cast(case_timestamp_to_date

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select cast(cast_int_to_string as string), cast(cast_String_to_int as int), cast(case_string_to_timestamp as timestamp), cast(case_timestamp_to_date

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WHEN "input" < 1000 THEN concat( cast( "input" AS VARCHAR ), '行' ) WHEN "input" < 1000 * 1000 THEN concat( cast( round( "input"/ 1000, 1 ) AS VARCHAR

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参数 描述 r RAW类型对象 UTL_RAW.CAST_TO_RAW 存储过程CAST_TO_RAW将VARCHAR2类型的对象转换成RAW类型。 UTL_RAW.CAST_TO_RAW函数原型为： 1 2 3 UTL_RAW.CAST_TO_RAW( c IN VARCHAR2)

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参数 描述 r RAW类型对象 UTL_RAW.CAST_TO_RAW 存储过程CAST_TO_RAW将VARCHAR2类型的对象转换成RAW类型。 UTL_RAW.CAST_TO_RAW函数原型为： 1 2 3 UTL_RAW.CAST_TO_RAW( c IN VARCHAR2)

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是‘CB’。 DBE_RAW.CAST_FROM_BINARY_INTEGER_TO_RAW 存储过程CAST_FROM_BINARY_INTEGER_TO_RAW将INTEGER类型值转换为二进制表示形式（即RAW类型）。 DBE_RAW.CAST_FROM_BINARY_INTEGER_TO_RAW函数原型为：

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MySQL数据库 GaussDB数据库 差异 1 CAST() 支持 GaussDB 不支持使用CAST(expr AS CHAR[(N)] charset_info或者CAST(expr AS NCHAR[(N)])转换字符集。 GaussDB不支持使用CAST(expr AS JSON)将表达式转换为JSON。

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col2*col1 from tb_a; 是 需要两个列的类型一样 物化视图使用源列，用户查询使用cast select col1,col2 from tb_a; select cast(col1 as varchar),col2 from tb_a; 否 物化视图使用原数据列，用户查询使用函数没有过滤条件不改写

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GAUSS-00971: "cast function must not be an aggregate function" SQLSTATE: 42P17 错误原因：函数不能是聚集函数。 解决办法：检查CAST函数，确保它不是聚集函数。 GAUSS-00972: "cast function

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是‘CB’。 DBE_RAW.CAST_FROM_BINARY_INTEGER_TO_RAW 存储过程CAST_FROM_BINARY_INTEGER_TO_RAW将INTEGER类型值转换为二进制表示形式（即RAW类型）。 DBE_RAW.CAST_FROM_BINARY_INTEGER_TO_RAW函数原型为：

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v_I := CAST(v_S AS INTEGER); v_F := CAST(v_T AS FLOAT); v_B := CAST(v_S AS TINYINT); v_S := 'a12'; v_I := CAST(v_S AS IN

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,'CAST(''00:00:00.999'' AS TIME(3))' AS NULLTIME ,'CAST(''0001-01-01

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DBE_RAW.CAST_FROM_VARCHAR2_TO_RAW 函数CAST_FROM_VARCHAR2_TO_RAW将VARCHAR2类型值转换为RAW类型。 DBE_RAW.CAST_FROM_VARCHAR2_TO_RAW函数原型为： 1 2 3 DBE_RAW.CAST_FROM_VARCHAR2_TO_RAW(

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concat( cast( cast ( diff [ 1 ] AS INTEGER ) AS VARCHAR ), ' 个' ) WHEN diff [ 1 ] < 1000 * 1000 THEN concat( cast( round( diff

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1000 THEN concat( cast( diff [ 1 ] AS VARCHAR ), ' 次' ) WHEN diff [ 1 ] < 1000 * 1000 THEN concat( cast( round( diff [ 1 ]/ 1000

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。 DBE_RAW.CAST_FROM_RAW_TO_BINARY_FLOAT 将RAW类型值转换为FLOAT4类型。 DBE_RAW.CAST_FROM_BINARY_FLOAT_TO_RAW 将FLOAT4类型值转换为RAW类型。 DBE_RAW.CAST_FROM_RAW_TO_NUMBER

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------+------------ 10 | 2023-10-05 (1 row) 通过类型转换函数CAST进行转换 select CAST('10' as int),CAST('2023-10-05' as date); int4 | date ------+------------

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GAUSS-00983: "cast from type %s to type %s does not exist" SQLSTATE: 42704 错误原因：从源数据类型到目标数据类型的CAST不存在。 解决办法：检查pg_cast系统表，看这个CAST是否存在，入不存在，可以进行

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数据类型 DECIMAL '0' DECIMAL(1) DECIMAL '12345' DECIMAL(5) DECIMAL '0000012345.1234500000' DECIMAL(20, 10) 二进制算术 decimal 运算符 支持标准数学运算符。下表说明了结果的精度

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HAVING MAX(CAST(salary AS NUMBER(10,2))+CAST(bonus AS NUMBER(10,2))) = CAST(MAlias1.salary AS NUMBER(10,2))+CAST(MAlias1

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