SQL>createtableemp1asselect*fromempwhere1=2; SQL>insertintoemp1select*from emp;conventional传统方式数据 SQL> insert /*+ APPEND */ into emp1 select * from emp; 直接方式数据,必须 commit后才能查看数据 创建表插入数据 代码语言:javascript 代码运行次数:0 运行 AI代码解释 SCOTT@PROD>create table tes...
FROMtablename1, tablename2WHEREcondition 常见的子查询: SELECT*FROMtablename1WHEREcolname1 [NOT]IN(SELECTcolname2FROMtablename2) SELECT*FROMtablename1WHEREcolname1=|!=(SELECTcolname2FROMtablename2) SELECT*FROMtablename1WHERE[NOT]EXISTS(SELECT*FROMtablename2WHEREtablename1.colname1=tablename2.col...
{ "namespace": "org.apache.hive", "name": "first_schema", "type": "record", "fields": [ { "name":"string1", "type":"string" }, { "name":"string2", "type":"string" } ] }');--Use personalized custom SerDe(we may need to `ADD JAR xxx.jar...
不指定表 SELECT 1, "hello" 指定表名、视图名、临时表名 SELECT ... FROM t1、 SELECT ... FROM v1、 SELECT ... FROM with1 指定表别名 SELECT ... FROM table2 as t2 多表联合查询 SELECT ... FROM t1, t2, t3 括号包含的子查询 SELECT ... FROM (SELECT ... FROM ...) 多表连接查询...
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 ...
@a := SELECT * FROM src WHERE key > 0; INSERT OVERWRITE table src2 SELECT * FROM @a; SELECT * FROM @a; 脚本模式支持IF语句: IF语句可以使程序根据条件,自动选择执行逻辑。MaxCompute的IF语法有如下几种类型。 IF (condition) BEGIN statement 1 statement 2 ... END IF (condition) BEGIN stateme...
select P.FirstName AS FN,P.MiddleName AS MN,P.LastName AS LN from Person.Person AS P 4.select FirstName,MiddleName from (select FirstName,MiddleName,LastName from Person.Person) AS PersonName PersonName相当于是一个虚拟表,把这个虚拟表当成是table source 其中()不能删除,删除后会出现语法错误...
USE TestDatabase; GO TRUNCATE TABLE myTestSkipField; BULK INSERT dbo.myTestSkipField FROM 'D:\BCP\myTestSkipField.bcp' WITH (FORMATFILE = 'D:\BCP\myTestSkipField.xml'); GO -- review results SELECT * FROM TestDatabase.dbo.myTestSkipField; 使用OPENROWSET(BULK...) 和非XML 格式檔案 在Mic...
EXTERNAL TABLE AS SELECT FULLTEXT CATALOG FULLTEXT INDEX FULLTEXT STOPLIST FUNCTION INDEX LOGIN MASTER KEY MESSAGE TYPE PARTITION FUNCTION PARTITION SCHEME PROCEDURE QUEUE REMOTE SERVICE BINDING RESOURCE POOL ROLE ROUTE RULE SCHEMA SEARCH PROPERTY LIST SECURITY POLICY SELECTIVE XML INDEX SEQUENCE SERVER AUD...
USETestDatabase; GOTRUNCATETABLEmyFirstImport;-- (for testing)BULKINSERTdbo.myFirstImportFROM'D:\BCP\myFirstImport.bcp'WITH(FORMATFILE ='D:\BCP\myFirstImport.fmt'); GO-- review resultsSELECT*FROMTestDatabase.dbo.myFirstImport; 使用BULK INSERT和XML 格式化文件 ...