如果数据库的“Select into/bulk copy” 选项设置为“True/On”,则可以用INTO 子句创建表和临时表,反之,则只能创建临时表。 10.1.3 FROM 子句 FROM 子句指定需要进行数据查询的表。只要SELECT 子句中有要查询的列,就必须使用FROM 子句。其语法如下: FROM {<table_source>} [,...n] <table_source> ::= t...
SELECT*FROM tb_table WHERE NAME="py"; <4> 注释:单行注释:-- 多行注释:/*...*/ <5>sql语句可以折行操作 <6> DDL,DML和DCL -- --SQL中 DML、DDL、DCL区别 . -- -- -- -- DML(data manipulation language): -- 它们是SELECT、UPDATE、INSERT、DELETE,就象它的名字一样,这4条命令是用来对数...
SQL Server 2022 (16.x) 和更新版本支援 CREATE EXTERNAL TABLE AS SELECT(CETAS) 來建立外部數據表,然後平行匯出 Transact-SQL SELECT 語句的結果至 Azure Data Lake Storage (ADLS) Gen2、Azure 儲存器帳戶 V2 和 S3 相容的物件記憶體。 注意 適用於 Azure SQL 受控...
SQL -- Example is based on AdventureWorksCREATEEXTERNALTABLEhdfsCustomerWITH( LOCATION ='/pdwdata/customer.tbl', DATA_SOURCE = customer_ds, FILE_FORMAT = customer_ff )ASSELECT*FROMdimCustomer; GO B. 通过 CREATE EXTERNAL TABLE AS SELECT 使用查询提示 ...
Transact-SQL (T-SQL) Reference Transact-SQL (T-SQL) Reference Date & time hierarchyid methods (database engine) Numeric String & binary Spatial geography & instances (geography Data Type) Spatial geometry & instances (geometry Data Type) Data types XML DBCC Functions Language elements Queries Quer...
SQL SELECT INTO – Insert Data from Multiple Tables In previous examples, we created a table using theSELECT INTOstatement from a single tableEmployee. We can also join multiple tables and use the SELECT INTO statement to create a new table with data as well. In this section, we want to ...
Microsoft.Data.Schema.ScriptDom.Sql 命名空间 AddAlterFullTextIndexAction 类 AddFileSpec 类 AddSignatureStatement 类 AdhocDataSource 类 AdhocTableSource 类 AffinityKind 枚举 AlgorithmKeyOption 类 AlterAction 枚举 AlterApplicationRoleStatement 类
SELECT ... INTO OUTFILE是LOAD DATA的补充。将列值转换为CHARACTER SET子句中指定的字符集。如果不存在此子句,则使用binary字符集转储值。实际上,没有字符集转换。如果结果集包含多个字符集中的列,则输出数据文件也将如此,您可能无法正确重新加载文件。
LOAD DATA INFILE'/tpm/xxx.csv' INTO TABLE xxxxxx FIELDS TERMINATED BY','LINES TERMINATED BY"\r\n" 有时需要导出CSV的表头,此时需要使用union进行处理: 1 2 3 4 5 6 select* from( SELECT'姓名','身份证号码','盟市','旗县' UNION
Populates the new table with the results from a SELECT statement. select_criteria is the body of the SELECT statement that determines which data to copy to the new table. For information about SELECT statements, see SELECT (Transact-SQL). Not ORDER BY clause in SELECT has no effect on CET...