- smallint :
- 2 bytes, range -32768 to +32767
- integer
- 4 bytes, range : -2147483648 to +2147483647
- bigint
- decimal
- variable, range: up to 131072 before and 16383 after decimal
points
- numeric
- real
- 4 bytes 6 decimal digit precision
- double
- 8 bytes, 15 decimal point
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