public static void main(String[] args) throws SQLException, IOException { LoadCSVFile load = new LoadCSVFile(); Connection conn = load.getConnection(); // 查看表中目前的数据,并清空表 String[] initArray = {"truncate table test"}; load.executeSQL(conn, initArray); // 这里的核心就是使用o...
This data contains two columns: ‘name’ and ‘price.’ Name appears to be a VARCHAR due to it’s different lengths. Price appears to be MONEY. This will help in creating the table to load the CSV file into. The first step, as stated before, is to create the table. It must have ...
[-D DATADIR] Dataload options: -i, --input=INPUT INPUT path or function -O, --output=OUTPUT OUTPUT path or table -l, --logfile=LOGFILE LOGFILE path -P, --parse-badfile=* PARSE_BADFILE path -u, --duplicate-badfile=* DUPLICATE_BADFILE path -o, --option="key=val" additional ...
INSERT INTO table [ ( column [, ...] ) ] { DEFAULT VALUES | VALUES ( { expression | DEFAULT } [, ...] ) | query }LISTEN监听一个通知。LISTEN nameLOAD加载或重载一个共享库文件。 LOAD 'filename'LOCK锁定一个表。LOCK [ TABLE ] name [, ...] [ IN lock_mode MODE ] [ NOWAIT ]...
COPY tablename FROM '/u01/pg/mydata.sql' WITH DELIMITER ',' CSV QUOTE '''; 耗时记录如下: ■ 100万 COPY 1000000 Time: 8938.071 ms (00:08.938) ■ 500万 COPY 4999966 Time: 70209.830 ms (01:10.210) COPY 5000000 Time: 56365.434 ms (00:56.365) COPY...
1SELECTarray_to_string(array(2selectattnamefrompg_attributewhereattrelid='表名称'::regclassandattnum>03andattisdropped='f'4),',')asname 有兴趣可以试试。 3.下载csv文件 4.编辑*.ctl控制文件 1loaddata2CHARACTERSET UTF83infile "/home/oracle/hthhf.csv"4truncate5intotablet_yw_hthhf_old6fields...
CREATETABLEpublic.mesh ( xintegerNOTNULL, yintegerNOTNULL, zinteger,CONSTRAINTprimPRIMARYKEY (x, y) ) 1. 导入 使用数据备份,csv格式导入,文件位于机械硬盘上,480MB,数据量2500w+。 使用COPY copymeshfrom'd:/user.csv'csv 运行时间107s 使用insert ...
Dataload: pg_bulkload[dataload options]control_file_path Recovery: pg_bulkload-r[-D DATADIR]Dataload options: -i,--input=INPUT INPUT path orfunction-O,--output=OUTPUT OUTPUT path or table -l,--logfile=LOGFILE LOGFILE path -P, --parse-badfile=* PARSE_BADFILE path ...
You also learn how to connect to PostgreSQL using the psql tool as well as how to load a sample database into the PostgreSQL for practicing. Basic Tutorial First, you’ll learn how to query data from a single table using basic data techniques, which include selecting data, sorting result ...
下一步是对将要导入的数据库表进行准备。对于COPY FROM来说,需要对表施加RowExclusiveLock级别的锁。这个级别与其它 DML 所施加的锁等级一致: LOCKMODElockmode=is_from?RowExclusiveLock:AccessShareLock;/* Open and lock the relation, using the appropriate lock type. */rel=table_openrv(stmt->relation,lock...