Software as a Service includes software with coding in it such as databases. But more importantly, some SaaS products require a lot of customisation and to achive a certain level of customisation you need to code. Think wordpress themes or Salesforce scripting.
NoCode promises a highly customised product that does things that traditionally needed code - like talking to APIs - but without any coding.
Often this means that in reality, you code visually or through a very complex series of dialogues and property lists that are akin to coding. This may however be more accessible or have a lower learning curve - even for an experienced programmer.