shard-crystal-sqlite3/samples/memory.cr
Brian J. Cardiff 8586182fd8
Update crystal-db ~> 0.10.0 and Crystal 0.35.0 for logging support (#58)
* Update crystal-db for logging support

* Update sample

* Update to crystal-db ~> 0.10.0
2020-09-30 11:34:25 -03:00

26 lines
689 B
Crystal

require "db"
require "../src/sqlite3"
DB.open "sqlite3://%3Amemory%3A" do |db|
db.exec "create table contacts (name text, 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: 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