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Python 2022-01-29 10:47:50
AttributeError: type object 'User' has no attribute 'query'
import os import sys from sqlalchemy import Column, ForeignKey, Integer, String, DateTime, Boolean, Float, Date, Table from sqlalchemy.ext.declarative import declarative_base from sqlalchemy.orm import relationship from sqlalchemy import create_engine fro... Add solution -
SQL 2022-01-29 08:20:11
update multiple columns in sql
-- Oracle UPDATE table2 t2 SET (VALUE1, VALUE2) = (SELECT COL1 AS VALUE1, COL1 AS VALUE2 FROM table1 t1 WHERE t1.ID = t2.ID); -- SQL Server UPDATE table2 t2 SET t2.VALUE1 = t1.COL1, t2.VALUE2 = t1.COL2 FROM table1 t1 INNER JOIN t2 ON t1.ID = ... Add solution -
Other 2022-01-28 20:45:58
checked vs unchecked exceptions
1) All the subclasses of Throwable class except error,Runtime Exception and its subclasses are checked exceptions. 2) Checked exception should be thrown with keyword throws or should be provided try catch block, else the program would not compile. We do... Add solution -
Other 2022-01-28 19:41:03
Export Sqlite Database as csv in android
public boolean exportDatabase() { DateFormat df = DateFormat.getDateInstance(DateFormat.SHORT, Locale.getDefault()); /**First of all we check if the external storage of the device is available for writing. * Remember that the ext... Add solution -
Other 2022-01-28 06:50:48
how to use excel in postman
Postman support data driven test with external file in csv, json format. And if we need to use excel we can convert to csv file since postman supports. I use mockaroo.com to generate randomized mock data. It supports generating CSV, JSON, SQL, Excel formats. Add solution -
SQL 2022-01-28 05:11:17
nuget sqllite-net-pcl
Install-Package sqlite-net-pcl -Version 1.7.335 Add solution -
SQL 2022-01-27 13:45:43
install sql server management studio ubuntu
No. You can use SQL Server Management Studio on Windows to manage SQL Server on Linux but the software itself needs Windows. The link from Microsoft does have a tip about a new tool that can: Tip If you do not have a Windows machine to run SSMS on, cons... Add solution -
PHP 2022-01-27 04:46:23
php prepared statement select
// Multiple rows: $sql = "SELECT * FROM users WHERE id=?"; $stmt = $conn->prepare($sql); $stmt->bind_param("i", $id); $stmt->execute(); $result = $stmt->get_result(); while ($row = $result->fetch_assoc()) { echo $ro... Add solution -
TypeScript 2022-01-27 01:51:13
subsets of sql
1- Data Manipulation Language(DML)-(SELECT, INSTERT, UPDATE...) DML statements affect records in table. These are basic operations we perform on data such as selecting few records from a table, inserting new records, deleting unnecessary records, updating... Add solution
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