SELECT table_schema as `Database`, table_name AS `Table`, round(((data_length + index_length) / 1024 / 1024), 2) `大小 (MB)` FROM information_schema.TABLES ORDER BY (data_length + index_length) DESC;
diskutil list #1.找到U盘的代号 比如disk2
/dev/disk2 (external, physical): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *7.7 GB disk2 1: EFI EFI 209.7 MB disk2s1 2: Microsoft Basic Data IDISK 7.4 GB disk2s2
diskutil unmountDisk /dev/disk2 #2. diskutil eraseDisk JHFS+ iDisk disk2 #3.
diskutil unmountDisk /dev/disk2 #2.
diskutil eraseDisk JHFS+ iDisk disk2 #3.
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diskutil list #1.找到U盘的代号 比如disk2
diskutil unmountDisk /dev/disk2 #2.
diskutil eraseDisk JHFS+ iDisk disk2 #3.