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場景: Android應用程序擁有超過10個表的數據庫。 必須將數據從服務器提取並存儲到sq-lite(移動)數據庫。 爲了有效地執行此操作,我計劃計算每個表的行大小。 分配給屬性的長度。使用mysql估計表大小
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| table_name | Size of single row with defined attributes length |
|----------------------------------------------------------------------------------|
| table_1 | size |
|----------------------------------------------------------------------------------|
| table_2 | size |
|----------------------------------------------------------------------------------|
| table_3 | size |
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是任何MySQL查詢來計算分配給屬性關於長表的單個行的長度,同時創造?
像我發現它顯示了一個表的大小查詢:
SELECT table_name AS "Table",
round(((data_length + index_length)/1024/1024), 2) "Size in MB"
FROM information_schema.TABLES
WHERE table_schema = "$DB_NAME"
AND table_name = "$TABLE_NAME";
或此查詢列出每個表的大小在數據庫中,最大的第一:
SELECT table_name AS "Tables",
round(((data_length + index_length)/1024/1024), 2) "Size in MB"
FROM information_schema.TABLES
WHERE table_schema = "$DB_NAME"
ORDER BY (data_length + index_length) DESC;