6). 格式化NUMBER类型列的显示: SQL> COLUMN SAL FORMAT99,990SQL>/EmployeeDepartmentNameSalaryCommission−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−30ALLEN99,990SQL>/EmployeeDepartmentNameSalaryCommission...
select cast(int_column as char) as string_column from your_table; # 或者 select convert(int_column,char) as string_column from your_table; # sql server: select cast(int_column as varchar) as string_column from your_table; # 或者 select convert(varchar,int_column) as string_column from ...
SELECTFORMAT(column_name,format) FROM table_name SELECTProductName, UnitPrice, FORMAT(Now(),'YYYY-MM-DD')asPerDateFROMProducts SQL 语句
# value_format : Encoding of the messages stored in the Kafka topic. For JSON encoding, each row will be stored as a JSON object whose keys/values are column names/values. # partitions : Number of partitions to create for the locations topic. Note that this parameter is not needed for ...
31、alter:①添加列:alter table 表名称 add 列名称 数据类型;②删除列:alter table 表名称 drop column列名称;③更改列:alter table 表名称 altercolumn 列名称数据类型;用于在已有表中添加,修改,删除列。 32、auto-increment:create table 表名称1(列名称1 数据类型 not null auto- increment,列名称2 数据类...
ALTER TABLE 管理 COLUMN ALTER TABLE 管理 PARTITION ALTER TABLE 或 CREATE TABLE .. MASK 子句 ALTER TABLE 或 CREATE TABLE .. ROW FILTER 條款 ALTER VIEW ALTER VOLUME COMMENT ON CREATE CATALOG CREATE CONNECTION CREATE DATABASE CREATE FUNCTION (SQL) CREATE FUNCTION (外部) 創建地點 CREATE MATERIALIZED...
(2)使用COUNT(column)对特定列中具有值的行进行计数,忽略NULL值。 例1:select count(*) as number from student;利用count(*)对所有行计数,不管行中各列有什么值。 例2:select count(university) from student;利用count(university)对university列中有值的行进行计数。
SQL20477N function-name 函數無法使用格式字串 format-string 來解譯引數 string-expression。 解說 已使用 format-string 及string-expression 呼叫function-name 函數。function-name 的值可能是 DECFLOAT_FORMAT,即使用來呼叫函數的名稱是 TO_NUMBER 亦然。無法以格式字串 format-string 解譯引數 string-expression 的...
Date Custom Number --- --- 09/08/2024 123-45-6789 C. FORMAT with numeric types The following example returns five rows from the Sales.CurrencyRate table in the AdventureWorks2022 database. The column EndOfDateRate is stored as type money in the table. In this example, the column is ...
To allow duplicate values in a column To automatically generate a unique number for a column To reset column values after deletion To format column data as text Submit Answer » ❮ PreviousNext ❯ Track your progress - it's free!