Trajecotry常见问题
插入数据 insert into traj(id,traj)select 1,ST_MakeTrajectory('STPOINT':leaftype,x,y,4326,t,ARRAY['speed'],NULL,s,NULL)FROM(select array_agg(x order by id)as x,array_agg(y order by id)as y,array_agg(t order by id)as t,array...
Trajectory常见问题
插入数据 insert into traj(id,traj)select 1,ST_MakeTrajectory('STPOINT':leaftype,x,y,4326,t,ARRAY['speed'],NULL,s,NULL)FROM(select array_agg(x order by id)as x,array_agg(y order by id)as y,array_agg(t order by id)as t,array...
DML语句
INSERT INTO 表示向分区表或非分区表插入数据。代码示例如下所示：向非分区表 h0 中插入数据。insert into h0 select 1,'a1',20;向静态分区表 h_p0 中插入数据。insert into h_p0 partition(dt='2021-01-02')select 1,'a1';向动态分区表 h_...
DML操作
单值分区表插入数据 INSERT INTO TABLE<table_name>PARTITION(<partition_key1>=<partition_value>[,<partition_key2>=<partition_value>,.])SELECT<select_statement>FROM;select_statement>中的列必须和<table_name>中 非分区键 的列...
ST_Patch
通过pcpoint数组构造一个pcpatch对象。语法 pcpatch ST_Patch(pcpoint[]pts);参数 参数名称 描述 pts pcpoint数组。示例 INSERT INTO patches(pa)SELECT ST_Patch(pt)FROM points GROUP BY id/10;
Append Hints
默认情况下，PolarDB PostgreSQL版（兼容Oracle）会将新数据添加到表中第一个可用的空间（由抽空的记录腾出空间）。...Append hint还可包括在 INSERT INTO 语句的 SELECT 子句中：INSERT INTO sales_history SELECT/*+APPEND*/FROM sales;
ST_Patch
通过pcpoint数组构造一个pcpatch对象。语法 pcpatch ST_Patch(pcpoint[]pts);参数 参数名称 描述 pts pcpoint数组。示例 INSERT INTO patches(pa)SELECT ST_Patch(pt)FROM points GROUP BY id/10;
Append Hints
默认情况下，PolarDB PostgreSQL版（兼容Oracle）会将新数据添加到表中第一个可用的空间（由抽空的记录腾出空间）。...Append hint还可包括在 INSERT INTO 语句的 SELECT 子句中：INSERT INTO sales_history SELECT/*+APPEND*/FROM sales;
ST_Patch
通过pcpoint数组构造一个pcpatch对象。语法 pcpatch ST_Patch(pcpoint[]pts);参数 参数名称 描述 pts pcpoint数组。示例 INSERT INTO patches(pa)SELECT ST_Patch(pt)FROM points GROUP BY id/10;
使用DML插入、更新、删除数据
语法如下：INSERT INTO table[(column[,.])]{DEFAULT VALUES|VALUES({expression|DEFAULT}[,.])[,.]|query} 示例：插入单行数据。INSERT INTO products(name,price,product_no)VALUES('Cheese',9.99,1);在一条命令中插入多行数据。INSERT ...
decoder_raw
INSERT INTO aa VALUES(1,'aa'),(2,'bb');Update of Non-selective column UPDATE aa SET b='cc' WHERE a=1;Update of only selective column UPDATE aa SET a=3 WHERE a=1;Update of both columns UPDATE aa SET a=4,b='dd' WHERE a=2;...
位串类型
ERROR:bit string length 2 does not match type bit(3)INSERT INTO test VALUES(B'10':bit(3),B'101');SELECT*FROM test;a|b-+-101|00 100|101 一个位串值对于每8位的组需要一个字节，外加总共5个或8个字节，这取决于串的长度。
ALTER TRIGGER
tgrelid|tgname|tgenabled-+-+-16386|emp_audit|O(1 row)testdb=>insert into emp values(1,'Alice');ERROR:INSERT is illegal on emp.CONTEXT:PL/pgSQL function process_emp_audit()line 12 at RAISE testdb=>ALTER TRIGGER emp_audit ...
读写一致性
使用方式如下：写入部分：insert into t values(.)insert into t values(.)flush table t 这里的 flush 命令用于强制写入数据。读部分：/*consistency=strong*/select*from t limit 10/*consistency=strong*/select count(*)from t where ...
TRUNCATE
INSERT INTO event(id,name,tag)values(23,'buy','num');SELECT*FROM event;TRUNCATE TABLE event;示例二。CREATE TABLE event_1(id serial,name text,tag text);INSERT INTO event_1(name,tag)values('buy','num');SELECT*FROM event_1;...
INSERT
语法 INSERT INTO table[subquery][@dblink][(column[,.])]{ VALUES({ expression|DEFAULT }[,.])[RETURNING return_expression[,.]{ INTO { record|variable[,.]}|BULK COLLECT INTO collection[,.]}]|query } 说明 INSERT 允许您在表中...
Dataphin管道任务从SqlServer抽取数据时，空字符串的...
字段dept_name的数据存在空字符串，需要将空串替换为0 create table luyao.tbl_dept(dept_id int primary key,dept_name nvarchar(100)not null,dept_address nvarchar(100))insert into luyao.tbl_dept(dept_id,dept_name,dept_address)...
ODBC
增删改查*/ExecuteInsertStatement(&hStmt,(UCHAR*)"INSERT INTO EMP(EMPNO,ENAME)VALUES((SELECT COUNT(EMPNO)FROM EMP),'JACKSON')");ExecuteUpdate(&hStmt,(UCHAR*)"UPDATE EMP SET ENAME='ODBC Test' WHERE EMPNO);...
并行INSERT
通过 polar_px_insert_dop_num 参数调整 INSERT INTO.SELECT.中写入的并行度。当查询并行度较低时，逐步提升写入并行度，SQL执行时间将会逐渐下降并趋于平缓，趋于平缓的原因是查询速度跟不上写入速度而成为瓶颈。当查询并行度较高时，逐步...
导出至HDFS
方式三：INSERT OVERWRITE PARTITION 与 INSERT INTO PARTITION 使用方法相同，但使用 INSERT OVERWRITE PARTITION 时，会覆盖掉本次执行中涉及到的目标分区中之前已有的数据文件，对于没有新数据写入的分区，则不会清除其中的数据文件。...
RELEASE SAVEPOINT
本文介绍了RELEASE SAVEPOINT的语法、参数以及示例等内容。简介 RELEASE SAVEPOINT 销毁...INSERT INTO table1 VALUES(3);SAVEPOINT my_savepoint;INSERT INTO table1 VALUES(4);RELEASE SAVEPOINT my_savepoint;COMMIT;上述事务将插入3和4。
INSERT
语法[WITH[RECURSIVE]with_query[,.]]INSERT INTO table_name[AS alias][(column_name[,.])][OVERRIDING { SYSTEM|USER } VALUE]{ DEFAULT VALUES|VALUES({ expression|DEFAULT }[,.])[,.]|query }[ON CONFLICT[conflict_target]conflict_...
ST_MakeTexture
Insert a 225*225 RGBA PNG file,with internal store binary stream INSERT INTO textures VALUES(1,ST_MakeTexture(225,225,'path/example.png':cstring,true,4,'PNG'));Insert a 225*255 RGB JPEG file,with binary stream in file ...
ST_MakeTexture
Insert a 225*225 RGBA PNG file,with internal store binary stream INSERT INTO textures VALUES(1,ST_MakeTexture(225,225,'path/example.png':cstring,true,4,'PNG'));Insert a 225*255 RGB JPEG file,with binary stream in file ...
SQL事务能力
insert into dml_test select i from generate_series(1,100000)t(i);对insert into执行cancel rollback;dml_test被锁住 使用说明：目前混合DML事务默认关闭，需要通过如下GUC参数开启：set hg_experimental_enable_transaction=on;开启...
并行INSERT
通过 polar_px_insert_dop_num 参数调整 INSERT INTO.SELECT.中写入的并行度。当查询并行度较低时，逐步提升写入并行度，SQL执行时间将会逐渐下降并趋于平缓，趋于平缓的原因是查询速度跟不上写入速度而成为瓶颈。当查询并行度较高时，逐步...
COMMIT
BEGIN INSERT INTO dept VALUES(50,'FINANCE','DALLAS');INSERT INTO dept VALUES(60,'MARKETING','CHICAGO');COMMIT;INSERT INTO dept VALUES(70,'HUMAN RESOURCES','CHICAGO');EXCEPTION WHEN OTHERS THEN DBMS_OUTPUT.PUT_LINE('SQLERRM...
数据可视化
插入数据*/INSERT INTO `student_courses` VALUES(1,1,1,'2020-11-24 11:19:54',78);INSERT INTO `student_courses` VALUES(2,1,2,'2020-11-24 05:51:36',68);INSERT INTO `student_courses` VALUES(3,1,3,'2020-11-24 05:28:08',60);...
polar_comp_stmt_level_tx
INSERT INTO emp(empno,ename,deptno)VALUES(9001,'JONES',40);INSERT INTO emp(empno,ename,deptno)VALUES(9002,'JONES',00);ERROR:insert or update on table"emp"violates foreign key constraint"emp_ref_dept_fk"DETAIL:Key(deptno)=...
MaxCompute+Hadoop搭建实践
hive>insert into table testtbl1 select"test1;hive>insert into table testtbl1 select"test2;hive>insert into table testtbl1 select"test3;hive>insert into table testtbl1 select"test4;hive>insert into table testtbl1 select...
通过Lindorm JDBC Driver连接并访问时序引擎
PreparedStatement 批量写入数据（推荐使用）PreparedStatement pstmt=conn.prepareStatement("INSERT INTO sensor(device_id,region,time,temperature,humidity)VALUES?int batchSize=100;long ts=System.currentTimeMillis();for(int ...
SparkSQL合并小文件功能使用说明
支持的SQL 支持以下类型的SQL语句，示例如下所示：INSERT INTO table_a SELECT*FROM table_b CREATE TABLE table_a AS SELECT*FROM table_b INSERT OVERWRITE TABLE table_c PARTITION(dt=20221228)SELECT*FROM table_d INSERT INTO table_...
RDS增量数据同步至MaxCompute
Insert into oplog values(str_to_date('2016-11-11','%Y-%m-%d'),'LiLei','SELECT','SUCCESS');Insert into oplog values(str_to_date('2016-11-12','%Y-%m-%d'),'HanMM','DESC','SUCCESS');上述的两条数据作为历史数据，需要先进行一次全...
RDS增量数据同步至MaxCompute
Insert into oplog values(str_to_date('2016-11-11','%Y-%m-%d'),'LiLei','SELECT','SUCCESS');Insert into oplog values(str_to_date('2016-11-12','%Y-%m-%d'),'HanMM','DESC','SUCCESS');上述的两条数据作为历史数据，需要先进行一次全...
集成PyEncMySQL
database=DATABASE,encjdbc_conf=ENCJDBC_CONF_PATH,encjdbc_jar_path=ENCJDBC_JAR_PATH)cursor=conn.cursor()cursor.execute("drop table if exists test")cursor.execute("create table test(v int)")cursor.execute("insert into test ...
任务编排
插入数据 INSERT INTO test(`gmt_create`,`gmt_modified`,`content`)VALUES('2020-01-01 01:00:00','2020-01-01 01:00:00','value1');INSERT INTO test(`gmt_create`,`gmt_modified`,`content`)VALUES('2020-02-01 01:00:00','2020-02-01 ...
批量更新、删除或插入数据
方式一：使用INSERT INTO.SELECT 示例语句-向tbl1表中批量插入数据 INSERT INTO tbl1(id,info,crt_time)SELECT GENERATE_SERIES(1,10000),'test',NOW();查询数据量 SELECT COUNT(*)FROM tbl1;返回结果 count-10000(1 row)方式二：使用...
BEFORE行级触发器
INSERT INTO emp VALUES(9005,'ROBERS','SALESMAN',7782,SYSDATE,3000.00,NULL,30);INSERT INTO emp VALUES(9006,'ALLEN','SALESMAN',7782,SYSDATE,4500.00,NULL,30);SELECT*FROM emp WHERE empno IN(9005,9006);EMPNO ENAME JOB MGR ...
oss_fdw
INSERT INTO t1_oss VALUES(generate_series(1,100),0.1,'hello');此时，插入该表的数据已经写入到OSS的 archive/路径下的文件中。使用如下方法可以查询该外部表。EXPLAIN SELECT COUNT(*)FROM t1_oss;QUERY PLAN-Aggregate(cost=6.54.6.54...
oss_fdw
INSERT INTO t1_oss VALUES(generate_series(1,100),0.1,'hello');此时，插入该表的数据已经写入到OSS的 archive/路径下的文件中。使用如下方法可以查询该外部表。EXPLAIN SELECT COUNT(*)FROM t1_oss;QUERY PLAN-Aggregate(cost=6.54.6.54...
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