SQL语句大全 –语 句功能 –数据操作 SELECT –从数据库表中检索数据行和列 INSERT –向数据库表添加新数据行 DELETE –从数据库表中删除数据行 UPDATE –更新数据库表中的数据 -数据定义 CREATE TABLE –创建一个数据库表 DROP TABLE –从数据库中删除表 ALTER TABLE –修改数据库表结构 CREATE VIEW –创建...
SQL Queries for Data Analysis: 一个收集了用于数据分析的 SQL 查询示例的存储库，包含了从简单到复杂...
Removes all control characters, such as tabs and new line characters from the output. This parameter preserves column formatting when data is returned.-k removes control characters. -k1 replaces each control character with a space. -k2 replaces consecutive control characters with a single space....
COPY {FROMdatabase| TOdatabase| FROMdatabaseTOdatabase} {APPEND | CREATE | INSERT | REPLACE}destination_table[(column,column,column, ...)] USINGquery DEF[INE] [variable] | [variable=text] DEL [n|n m|n* |nLAST | * | *n| * LAST | LAST] ...
how do i replace the usage of "connect by prior" in SQL SERVER 2008-R2 ? How do I return a TRUE or FALSE using a Stored Procedure? How do I run update query without committing? How do I use a variable to specify the column name in a select statement? How do I use my CURSOR Va...
Allow caching of the SQLServerBulkCopy object when using bulk copy for batch insert Replaces previous behavior, where each call of executeBatch() generated a new SQLServerBulkCopy object, by caching the object instead. Added connection level caching for destination column metadate in bulk copy Impro...
CREATE OR REPLACE TRIGGER set_sort_order AFTER LOGON ON DATABASE DECLARE username VARCHAR2(30); BEGIN username:=SYS_CONTEXT('USERENV','SESSION_USER'); IF username LIKE 'SMITH' then execute immediate 'alter session set NLS_COMP=LINGUISTIC'; execute immediate 'alter session setNLS_SORT=GERMAN_...
Now consider an example similar to the previous one, except that a local variable @d2 replaces @d+1 in the query and the expression is evaluated in a SET statement instead of in the query.SQL Copy USE AdventureWorks2022; GO CREATE PROCEDURE MyProc2( @d datetime ) AS BEGIN DECLARE @...
Drop the existing clustered columnstore index with an automatically created name, then create a new clustered columnstore index with a user-defined name. Drop and replace the existing index with a clustered columnstore index, keeping the same system-generated name, such as ClusteredIndex_1bd8af8797...
How to merge/replace data in a table when importing new data from csv How to migrate data to tables with foreign key constraints in correct sequence ? How to migrate Oracle blob data to SQL server How to obtain multiple matches from Lookup How to Open .csv.gz file How to Overwrite an ...