Table: ibm_esa_390
Columns: model
year_introduced
number_of_cpus
performance_mips
memory_gb

Question: Which Model has a Number of CPUs of 1–10, and a Performance (MIPS) of 49–447?
SQL: SELECT "model" FROM ibm_esa_390 WHERE "number_of_cpus" = '1–10' AND "performance_mips" = '49–447'

Question: Which Year Introduced has a Memory (GB) of 0.125–2?
SQL: SELECT MAX("year_introduced") FROM ibm_esa_390 WHERE "memory_gb" = '0.125–2'

Question: Which Number of CPUs has a Memory (GB) of 0.5–16?
SQL: SELECT "number_of_cpus" FROM ibm_esa_390 WHERE "memory_gb" = '0.5–16'

Question: Which Memory (GB) has a Number of CPUs of 1–6?
SQL: SELECT "memory_gb" FROM ibm_esa_390 WHERE "number_of_cpus" = '1–6'