diff --git a/packages/server/src/complete/Identifier.ts b/packages/server/src/complete/Identifier.ts
index 8ba356f1..26333313 100644
--- a/packages/server/src/complete/Identifier.ts
+++ b/packages/server/src/complete/Identifier.ts
@@ -47,7 +47,7 @@ export class Identifier {
       let tableName = label
       const i = tableName.lastIndexOf('.')
       if (i > 0) {
-        tableName = label.substr(i + 1)
+        tableName = label.substring(i + 1)
       }
       tableAlias = makeTableAlias(tableName)
       kindName = 'table'
diff --git a/packages/server/src/complete/StringUtils.ts b/packages/server/src/complete/StringUtils.ts
index 92143eb4..484de348 100644
--- a/packages/server/src/complete/StringUtils.ts
+++ b/packages/server/src/complete/StringUtils.ts
@@ -17,21 +17,6 @@ export function getRidOfAfterPosString(sql: string, pos: Pos): string {
     .join('\n')
 }
 
-// Gets the last token from the given string considering that tokens can contain dots.
-export function getLastToken(sql: string): string {
-  const match = sql.match(/^(?:.|\s)*[^A-z0-9\\.:'](.*?)$/)
-  if (match) {
-    let prevToken = ''
-    let currentToken = match[1]
-    while (currentToken != prevToken) {
-      prevToken = currentToken
-      currentToken = prevToken.replace(/\[.*?\]/, '')
-    }
-    return currentToken
-  }
-  return sql
-}
-
 export function makeTableName(table: Table): string {
   if (table.catalog) {
     return table.catalog + '.' + table.database + '.' + table.tableName
diff --git a/packages/server/src/complete/complete.ts b/packages/server/src/complete/complete.ts
index e819c408..5196308f 100644
--- a/packages/server/src/complete/complete.ts
+++ b/packages/server/src/complete/complete.ts
@@ -13,7 +13,8 @@ import {
 import log4js from 'log4js'
 import { CompletionItem } from 'vscode-languageserver-types'
 import { Schema, Table } from '../database_libs/AbstractClient'
-import { getRidOfAfterPosString, getLastToken } from './StringUtils'
+import { getRidOfAfterPosString } from './StringUtils'
+import { getLastToken } from './utils/getLastToken'
 import {
   isPosInLocation,
   createTablesFromFromNodes,
diff --git a/packages/server/src/complete/utils/getLastToken.ts b/packages/server/src/complete/utils/getLastToken.ts
new file mode 100644
index 00000000..94f291ef
--- /dev/null
+++ b/packages/server/src/complete/utils/getLastToken.ts
@@ -0,0 +1,14 @@
+// Gets the last token from the given string considering that tokens can contain dots.
+export function getLastToken(sql: string): string {
+  const match = sql.match(/^(?:.|\s)*[^A-z0-9\\.:'"](.*?)$/)
+  if (match) {
+    let prevToken = ''
+    let currentToken = match[1]
+    while (currentToken !== prevToken) {
+      prevToken = currentToken
+      currentToken = prevToken.replace(/\[.*?\]/, '') // remove []
+    }
+    return currentToken.replace(/"/g, '') // remove ""
+  }
+  return sql
+}
diff --git a/packages/server/test/complete/StringUtils.test.ts b/packages/server/test/complete/StringUtils.test.ts
deleted file mode 100644
index 30d3b7b0..00000000
--- a/packages/server/test/complete/StringUtils.test.ts
+++ /dev/null
@@ -1,30 +0,0 @@
-import * as StringUtils from '../../src/complete/StringUtils'
-describe('StringUtils', () => {
-  test('getLastToken', () => {
-    expect(StringUtils.getLastToken('SELECT  abc')).toEqual('abc')
-    expect(StringUtils.getLastToken('SELECT  abc.def')).toEqual('abc.def')
-    expect(StringUtils.getLastToken('SELECT  abc[0]')).toEqual('abc')
-    expect(StringUtils.getLastToken('SELECT  abc[0].')).toEqual('abc.')
-    expect(StringUtils.getLastToken('SELECT  abc[0].d')).toEqual('abc.d')
-    expect(StringUtils.getLastToken('SELECT  abc[0].def[0]')).toEqual('abc.def')
-    expect(StringUtils.getLastToken('SELECT  abc[0].def[0].')).toEqual(
-      'abc.def.'
-    )
-    expect(StringUtils.getLastToken('SELECT  abc[0].def[0].g')).toEqual(
-      'abc.def.g'
-    )
-
-    expect(StringUtils.getLastToken("SELECT  abc['key']")).toEqual('abc')
-    expect(StringUtils.getLastToken("SELECT  abc['key.name'].")).toEqual('abc.')
-    expect(StringUtils.getLastToken("SELECT  abc['key'].d")).toEqual('abc.d')
-    expect(StringUtils.getLastToken("SELECT  abc['key'].def['key']")).toEqual(
-      'abc.def'
-    )
-    expect(StringUtils.getLastToken("SELECT  abc['key'].def['key'].")).toEqual(
-      'abc.def.'
-    )
-    expect(StringUtils.getLastToken("SELECT  abc['key'].def[0].g")).toEqual(
-      'abc.def.g'
-    )
-  })
-})
diff --git a/packages/server/test/complete/complete_column.test.ts b/packages/server/test/complete/complete_column.test.ts
index 52a5b9c5..9781f9fd 100644
--- a/packages/server/test/complete/complete_column.test.ts
+++ b/packages/server/test/complete/complete_column.test.ts
@@ -123,8 +123,7 @@ describe('ColumnName completion', () => {
     expect(result.candidates.length).toEqual(0)
   })
 
-  // TODO: Implement completion
-  test.skip('complete ColumnName with back quoted table', () => {
+  test('complete ColumnName with back quoted table', () => {
     const result = complete(
       'SELECT "TABLE1". FROM "TABLE1"',
       { line: 0, column: 16 },
diff --git a/packages/server/test/complete/utils/getLastToken.test.ts b/packages/server/test/complete/utils/getLastToken.test.ts
new file mode 100644
index 00000000..15f05f8e
--- /dev/null
+++ b/packages/server/test/complete/utils/getLastToken.test.ts
@@ -0,0 +1,22 @@
+import { getLastToken } from '../../../src/complete/utils/getLastToken'
+
+describe('getLastToken', () => {
+  test('getLastToken', () => {
+    expect(getLastToken('SELECT  abc')).toEqual('abc')
+    expect(getLastToken('SELECT  abc.def')).toEqual('abc.def')
+    expect(getLastToken('SELECT  abc[0]')).toEqual('abc')
+    expect(getLastToken('SELECT  abc[0].')).toEqual('abc.')
+    expect(getLastToken('SELECT  abc[0].d')).toEqual('abc.d')
+    expect(getLastToken('SELECT  abc[0].def[0]')).toEqual('abc.def')
+    expect(getLastToken('SELECT  abc[0].def[0].')).toEqual('abc.def.')
+    expect(getLastToken('SELECT  abc[0].def[0].g')).toEqual('abc.def.g')
+
+    expect(getLastToken("SELECT  abc['key']")).toEqual('abc')
+    expect(getLastToken("SELECT  abc['key.name'].")).toEqual('abc.')
+    expect(getLastToken("SELECT  abc['key'].d")).toEqual('abc.d')
+    expect(getLastToken("SELECT  abc['key'].def['key']")).toEqual('abc.def')
+    expect(getLastToken("SELECT  abc['key'].def['key'].")).toEqual('abc.def.')
+    expect(getLastToken("SELECT  abc['key'].def[0].g")).toEqual('abc.def.g')
+    expect(getLastToken('SELECT  "abc"')).toEqual('abc')
+  })
+})