今天把以前的.net项目转换为rails时,数据庘由sql server换到postgresql,中间有个表中有地图标记x, y默认都是文本的,转换成float时,出现 PG::DatatypeMismatch:ERROR:column"x"cannotbecastautomaticallytotypefloatHINT:SpecifyaUSINGexpressiontoperformtheconversion. 谷歌下,找到如下答案 ALTER TABLE thename TYPE floa...
Connected to the database. Context extra_float_digits has been introduced in PostgreSQL 8.4 to play around the apparent precision of the lossy datatype "float". At first to increase the precision sent to the client, then since version 12, to reduce it. In pgJDBC, if you want the "full"...
postgresql和mysql数据库中使用sum聚合函数查询,结果出现不确定的小数 问题,大致的解决方式差不多。在Mysql中,可将字段类型修改为decimal或者numeric类型;简单来说decimal,numeric属于标准数据类型,指定精度和刻度;double,float属于非标准数据类型,在DB中保存的是近似值,而Decimal则以字符串的形式保存数值。需要精确存储数值...
Environment Knex version: 0.16.2 Database + version: PostgreSQL 10.5 OS: debian 9 stretch Bug When setting precision and scale on a float inside a migration, those values are being ignored. I set it to table.float('myfloat', 3, 2); but i...
sqlite_db = create_engine('sqlite:///:memory:') # in-memory database # postgresql pg_db = create_engine('postgres://scott:tiger@localhost/mydatabase') # mysql mysql_db = create_engine('mysql://scott:tiger@localhost/mydatabase') ...
Database Data Type and Conversion SQL Server FLOAT(p) MySQL FLOAT(p,s) PostgreSQL FLOAT(p) Sybase ASE FLOAT(p) Informix FLOAT(p), p is ignored HP Neoview FLOAT(p) Ingres REAL Related Data Types in Oracle Data Types Floating-point, fixed-point and integers NUMBER FLOAT BINAR...
pg_dump drupal>/opt/Postgresql/backup/1.bak 1. greenplum:空值转换函数 COALESCE 相当于Oracle中的nvl 例如:COALESCE(f1,0) greenplum 查看每个schema的占用大小 select schemaname, round(sum(pg_total_relation_size(schemaname||'.'||tablename))/1024/1024/1024,2) as "GB" ...
postgresqlodoo10 9017Views Sarina In odoo, I needed an update trigger, which would not let any user to update inserted data. I used following trigger function for rejecting update. The functio and trigger did work but it gives error TypeError: unsupported operand type(s)...
#dataSources: # ds_0: # url: jdbc:postgresql://127.0.0.1:5432/demo_ds_0?serverTimezone=UTC&useSSL=false # username: postgres # password: postgres # connectionTimeoutMilliseconds: 30000 # idleTimeoutMilliseconds: 60000 # maxLifetimeMilliseconds: 1800000 # maxPoolSize: 50 # ds_1: # url:...
Import data from postgreSQL into SQL server 2005 import data into table that has a timestamp Import flat file which has changing column order using SSIS import images in Excel file to SQL database Import Multiple Files into Multiple Tables using SSIS Import multiple files using sql server managem...