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add bulk insert method
API :
connection.queryBulk(sql, values) -> Promise
sql: string | JSON SQL string or JSON object to supersede default connection options. When using JSON object, object must have a "sql" key. For instance, { dateStrings: true, sql: 'SELECT now()' }
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values: array of array, or in case of having one parameter per row, a single array.
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Returns a promise that :
resolves with a JSON object or with an Error.
For instance, when using an SQL string:
connection
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.queryBulk("INSERT INTO myTable(col1, col2) values (?, ?)", [[1, 'john'], [2, 'jack']])
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.then(rows => {
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console.log(rows);
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})
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.catch(err => {
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//handle error
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});
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