A money balance that cannot go negative
Design a ledger table for money balances: the balance is a number with two decimals, required, defaults to 0, and cannot be negative. Columns: id — primary key; balance.
Díreach CREATE/ALTER/DROP — ní gá SELECT ina dhiaidh sin.
Logáil isteach chun stair na n-aighneachtaí a fheiceáil
Logáil isteachLogáil isteach chun an Meantóir IS a úsáid
Logáil isteachGan scéim tosaithe
Tosaíonn an tasc seo gan táblaí — cruthóidh tú iad le CREATE TABLE.