Eldritch Knight

Eldritch Knight is a Fighter subclass from the PHB. It functions as printed, except as noted below.

Spellcasting

Eldritch Knights are not "one-third casters" but rather half-casters. See the Classes page re the removal of "one-third" casting.

Choose three schools of magic. Wizard spells from those schools are the spells that you have access to, rather than the two specific schools noted in the published subclass description. Note that the most iconic and likely most useful schools for an Eldritch Knight are Abjuration, Evocation, and Transmutation; however, you can build your own character your own way.
At 4th, 8th, 12th, 16th, and 20th level, you learn an additional spell known on top of the spells known from your half-caster table, and these specific spells may be any wizard spell from any school at the spell levels you have access to.
You still start with two wizard cantrips from any school and gain a third cantrip at 10th level.