['DataError','DatabaseError','Error','IntegrityError','InterfaceError','InternalError','NotSupportedError','OperationalError','ProgrammingError','Warning','__call__','__class__','__delattr__','__dir__','__doc__','__enter__','__eq__','__exit__','__format__','__ge__','_...
mysql> CREATE DATABASE userdb; Query OK, 1 row affected (0.00 sec) mysql> USE userdb; Database changed 新建userlist表,字段设置及相关操作参考如下: mysql> CREATE TABLE userlist( -> username varchar(24) NOT NULL, -> password varchar(48) DEFAULT 'x', -> uid int(5) NOT NULL, -> gid ...
insert into table1 values ('' || select (select case when @@version like '5.1.56%' then sleep(5) else 'somevalue' end from ((select 'value1' as foobar)union (select 'value2' as foobar)) alias) || '') 1.
-- Use a filtered condition to separate hot data in a rowstore table -- from "warm" data in a columnstore index. -- create the table CREATE TABLE orders ( AccountKey int not null, CustomerName nvarchar (50), OrderNumber bigint, PurchasePrice d...
In some cases your database does not support this option, so you can use custom SQL instead. For example, suppose you have the following two tables: November and December. NovemberDecember You can use the following custom SQL query to append the second table, December, to the first table,...
Text2SQL(或称NL2SQL)是一种自然语言处理技术,旨在将自然语言(Natural Language)问题转化为关系型数据库中可执行的结构化查询语言(Structured Query Language,SQL),从而实现对数据库的查询和交互。这项技术的核心目标是通过自然语言描述,无需用户具备SQL语法知识,即可完成复杂的数据库查询任务 ...
OPENROWSET('provider_name', {'datasource';'user_id';'password'|'provider_string'} , { [ catalog. ] [ schema. ] object |'query'} ) OPENROWSET(BULK)语法用于读取外部文件: syntaxsql OPENROWSET(BULK'data_file', {FORMATFILE='format_file_path'[<bulk_options>] |SINGLE_BLOB|SINGLE_CLOB|SINGL...
Sign in Save Add to Collections Add to Plan Share via Facebookx.comLinkedInEmail alhowarthWF296Reputation points Oct 31, 2023, 12:22 AM We use the following code to send out emails with query results. Transact-SQL DECLARE @tableHTML NVARCHAR(MAX) ; SET @tableHTML = N'<H3 style="font...
CREATE INDEX index1 ON schema1.table1 (column1); 在表上创建聚集索引,并为表使用由 3 个部分组成的名称 SQL 复制 CREATE CLUSTERED INDEX index1 ON database1.schema1.table1 (column1); 使用唯一约束创建非聚集索引并指定排序顺序 SQL 复制 CREATE UNIQUE INDEX index1 ON schema1.table1 (column...
Query data of data sources by executing SQL statements,DataWorks:To query and analyze data in an efficient manner, you can execute SQL statements. For example, you can execute SQL statements to query data of data sources such as MaxCompute, E-MapReduce (