code: function leftJoinSql (tableA, aliasA, columnA, aliasB, columnB) {
      return this.joinSql(tableA, aliasA, columnA, aliasB, columnB, 'LEFT JOIN')
  }
docs: @function leftJoinSql
  
  bulid sql for LEFT JOIN
  LEFT JOIN tableA aliasA ON aliasA.`column` = aliasB.`column`
  
  @param {string} tableA
  @param {string} aliasA
  @param {string} columnA
  @param {string} aliasB
  @param {string} columnB
  
  @returns {string}
  
  @throws {Error}