mirror of
https://gitea.invidious.io/iv-org/shard-crystal-sqlite3.git
synced 2024-08-15 00:53:26 +00:00
45 lines
1.2 KiB
Markdown
45 lines
1.2 KiB
Markdown
# crystal-sqlite3 [](https://travis-ci.org/crystal-lang/crystal-sqlite3)
|
|
|
|
SQLite3 bindings for [Crystal](http://crystal-lang.org/).
|
|
|
|
Check [crystal-db](https://github.com/crystal-lang/crystal-db) for general db driver documentation. crystal-sqlite3 driver is registered under `sqlite3://` uri.
|
|
|
|
## Installation
|
|
|
|
Add this to your application's `shard.yml`:
|
|
|
|
```yml
|
|
dependencies:
|
|
sqlite3:
|
|
github: crystal-lang/crystal-sqlite3
|
|
```
|
|
|
|
### Usage
|
|
|
|
```crystal
|
|
require "sqlite3"
|
|
|
|
DB.open "sqlite3://./data.db" do |db|
|
|
db.exec "create table contacts (name string, age integer)"
|
|
db.exec "insert into contacts values (?, ?)", "John Doe", 30
|
|
|
|
args = [] of DB::Any
|
|
args << "Sarah"
|
|
args << 33
|
|
db.exec "insert into contacts values (?, ?)", args
|
|
|
|
puts "max age:"
|
|
puts db.scalar "select max(age) from contacts" # => 33
|
|
|
|
puts "contacts:"
|
|
db.query "select name, age from contacts order by age desc" do |rs|
|
|
puts "#{rs.column_name(0)} (#{rs.column_name(1)})"
|
|
# => name (age)
|
|
rs.each do
|
|
puts "#{rs.read(String)} (#{rs.read(Int32)})"
|
|
# => Sarah (33)
|
|
# => John Doe (30)
|
|
end
|
|
end
|
|
end
|
|
```
|