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我想使用上的NodeJS如何在mysql中列出列與模塊的MySQL
模塊的mysql列出表中的列的NodeJS當我運行查詢:
SHOW COLUMNS FROM tableName WHERE FIELD = columnName
它的做工精細,我可以知道列是否存在。
但我想列出列和我得到一個對象的列表,我不知道如何處理,如果我得到好的結果。
我想:
SHOW COLUMNS FROM tableName
DESCRIBE tableName
與這兩個查詢我得到的對象
{ catalog: 'def',
db: 'information_schema',
table: 'COLUMNS',
orgTable: 'COLUMNS',
name: 'Field',
orgName: 'COLUMN_NAME',
filler1: ,
charsetNr: 33,
length: 192,
type: 253,
flags: 1,
decimals: 0,
filler2: ,
default: undefined,
zeroFill: false,
protocol41: true }
{ catalog: 'def',
db: 'information_schema',
table: 'COLUMNS',
orgTable: 'COLUMNS',
name: 'Type',
orgName: 'COLUMN_TYPE',
filler1: ,
charsetNr: 33,
length: 589815,
type: 252,
flags: 17,
decimals: 0,
filler2: ,
default: undefined,
zeroFill: false,
protocol41: true }
{ catalog: 'def',
db: 'information_schema',
table: 'COLUMNS',
orgTable: 'COLUMNS',
name: 'Null',
orgName: 'IS_NULLABLE',
filler1: ,
charsetNr: 33,
length: 9,
type: 253,
flags: 1,
decimals: 0,
filler2: ,
default: undefined,
zeroFill: false,
protocol41: true }
{ catalog: 'def',
db: 'information_schema',
table: 'COLUMNS',
orgTable: 'COLUMNS',
name: 'Key',
orgName: 'COLUMN_KEY',
filler1: ,
charsetNr: 33,
length: 9,
type: 253,
flags: 1,
decimals: 0,
filler2: ,
default: undefined,
zeroFill: false,
protocol41: true }
{ catalog: 'def',
db: 'information_schema',
table: 'COLUMNS',
orgTable: 'COLUMNS',
name: 'Default',
orgName: 'COLUMN_DEFAULT',
filler1: ,
charsetNr: 33,
length: 589815,
type: 252,
flags: 16,
decimals: 0,
filler2: ,
default: undefined,
zeroFill: false,
protocol41: true }
{ catalog: 'def',
db: 'information_schema',
table: 'COLUMNS',
orgTable: 'COLUMNS',
name: 'Extra',
orgName: 'EXTRA',
filler1: ,
charsetNr: 33,
length: 90,
type: 253,
flags: 1,
decimals: 0,
filler2: ,
default: undefined,
zeroFill: false,
protocol41: true }
我使用的功能列表如下:
var mysql = require('mysql');
var connection = mysql.createConnection({
host : "host",
user : "user",
password : "pass",
database : "db"
});
connection.query(myQuery, function(err, rows, fields){
if(err) console.log(err);
if(fields) console.log(fields);
if(rows) console.log(rows);
});
如果有人有一個解決方案對於我來說,我也試着在information_schema中查找並獲得相同的結果。提前致謝。
同時如果有人可以告訴如何使用show table我會得到類似的結果。