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CHECK constraint in MySQL is not working
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MySQL 8.0.16 is the first version that supports CHECK constraints.
Read https://dev.mysql.com/doc/refman/8.0/en/create-table-check-constraints.html
If you use MySQL 8.0.15 or earlier, the MySQL Reference Manual says:
The...
Update multiple rows in same query using PostgreSQL
I'm looking to update multiple rows in PostgreSQL in one statement. Is there a way to do something like the following?
6 An...
Convert MySQL to SQlite [closed]
Is it possible to convert from MySQL to SQLite with a free tool on windows?
15 Answers
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How to create a multi-tenant database with shared table structures?
Our software currently runs on MySQL. The data of all tenants is stored in the same schema. Since we are using Ruby on Rails we can easily determine which data belongs to which tenant. However there are some companies of course who fear that their data might be compromised, so we are evaluating othe...
How to execute a stored procedure within C# program
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using (var conn = new SqlConnection(connectionString))
using (var command = new SqlCommand("ProcedureName", conn) {
CommandType = CommandType.StoredProcedure }) {
conn.Open();
command.ExecuteNonQuery();
}
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Best way to synchronize local HTML5 DB (WebSQL Storage, SQLite) with a server (2 way sync) [closed]
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I created a small JS lib named WebSqlSync to synchronize a local WebSql DB with a server (client <-> server). Very easy to use and to integrate in your code :
https://github.com/orbitaloop/WebSqlSync
The open source project QuickConnect contains a J...
Good PHP ORM Library?
...nd a base model. It works with all major PDO-supported database engines: MySQL, SQLite, SQL Server/Sybase, Oracle, PostgreSQL, etc.
/* SQL */
CREATE TABLE products (
product_id INTEGER,
description VARCHAR(128),
PRIMARY KEY (product_id)
);
/* PHP */
// Create
$product=new Axon('produc...
Best data type for storing currency values in a MySQL database
What is the best SQL data type for currency values? I'm using MySQL but would prefer a database independent type.
9 Answer...
Entity Framework 4 / POCO - Where to start? [closed]
I've been programming for a while and have used LINQ-To-SQL and LINQ-To-Entities before (although when using entities it has been on a Entity/Table 1-1 relationship - ie not much different than L2SQL)
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A type for Date only in C# - why is there no Date type?
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And their own SQL Server have Date type and result must be of type Date - if it was Date type result expected as string without time. For example Delphi also have Date as DateTime, but typeinfo different for Date and DateTime.
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