Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_28158 ( "Graphics" text, "Launch" real, "Market" text, "CPU" text, "Code name" text, "Device ID" real, "Core clock ( MHz )" text, "Execution units" real, "Shader model" text, "DirectX" text, "OpenGL" text, "OpenCL" text, "Memory bandwidth ( GB/s )" text, "DVMT ( MB )" real, "CVT HD" text, "QSV" text )

### Question ###
What's the minimum number of execution units?

### Accurate SQL ###

SELECT MIN("Execution units") FROM table_28158