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_2574 ( "Sigma level" real, "Sigma (with 1.5\u03c3 shift)" text, "DPMO" text, "Percent defective" text, "Percentage yield" text, "Short-term C pk" text, "Long-term C pk" text )

### Question ###
What is the sigma (with 1.5 shift) when there are 69% defective?

### Accurate SQL ###

SELECT "Sigma (with 1.5\u03c3 shift)" FROM table_2574 WHERE "Percent defective" = '69%'