From January 2015, she started to practice leetcode questions; she trains herself to stay focus, develops "muscle" memory when she practices those questions one by one.
2015年初, Julia开始参与做Leetcode, 开通自己第一个博客. 刷Leet code的题目, 她看了很多的代码, 每个人那学一点, 也开通Github, 发表自己的代码, 尝试写自己的一些体会.
She learns from her favorite sports – tennis, 10,000 serves practice builds up good memory for a great serve. Just keep going.
Hard work beats talent when talent fails to work hard.
Microsoft SQL Server Express: Version Comparison Matrix and Free Downloads
Microsoft SQL Server is an enterprise quality database management system that's usually hosted by a server and can scale across multiple servers and locations.
For local PC, small databases, and less critical situations, Microsoft offers a limited version of SQL Server called SQL Server Express. SQL Server Express can be downloaded for free and installed on your local PC. This is helpful for:
Deploying desktop Windows solutions that use SQL Server databases to users who don't own SQL Server
Deploying lightweight web applications that use SQL Server databases
Developers wanting to create and test applications with a SQL Server database on their own, rather than a database hosted on a server
There are many editions of the full version of SQL Server with Enterprise, Standard and Web being the most common. Here are some of the major differences of the 2017 version compared to the 2016 and 2017 Express editions:
Enterprise
Standard
Web
2019 Express
2017 Express
2016 Express
Maximum Database Size
524 PB
524 PB
524 PB
10 GB
10 GB
10 GB
Compute Capacity
OS Max
4 sockets or 24 cores
4 sockets or 16 cores
1 socket or 4 cores
1 socket or 4 cores
1 socket or 4 cores
Maximum Memory
OS Max
128 GB
64 GB
1.4 GB
1.4 GB
1.4 GB
Database Mirroring
Smart Backups, Encrypted Backups
SQL Profiler
The most critical issue is the maximum database size. The other differences are related to performance and maintenance.
The Canadian dollar lost over 1.5% of its value against the U.S. dollar in overnight trading
A nearly 3% slide in West Texas Intermediate oil prices
The Organization of the Petroleum Exporting Countries and Russia reached an agreement with the United Arab Emirates. The UAE’s base production level was increased along with other cartel members, and production is being increased by 400,000 barrels per day, beginning in August and continuing until the end of 2022.
USD/CAD - Canadian Dollar Falls off a Cliff
The Canadian dollar lost over 1.5% of its value against the U.S. dollar in overnight trading. A litany of woes transpired to pummel the currency, with plunging crude prices leading the way. A nearly 3% slide in West Texas Intermediate oil prices, combined with new COVID-19 delta variant cases in Europe and Australia, and heightened tensions between China and the U.S., triggered a stampede into safe-haven U.S. dollars.
The Organization of the Petroleum Exporting Countries and Russia reached an agreement with the United Arab Emirates. The UAE’s base production level was increased along with other cartel members, and production is being increased by 400,000 barrels per day, beginning in August and continuing until the end of 2022.
The drop in oil prices exacerbated negative Canadian dollar sentiment following last week’s more dovish than expected Bank of Canada policy meeting. Traders were unhappy with BoC downgrading 2021 economic growth to 6.0% from 6.5% in April, and took it out on the currency.
USD/CAD technicals are bullish while trading above $1.2405, supported by the break above the downtrend line from last November. The break above $1.2650 overnight sets the stage for a test of $1.3000.
Widespread safe-haven demand for U.S. dollars made the Canadian dollar the worst-performing currency compared to the U.S. dollar. The Australian and New Zealand dollars were not far behind, losing 1.0% and 0.77% respectively.
USD/JPY dropped from 110.09 to 109.62 due to U.S. 10-year Treasury yields falling to 1.248% from 1.30%, and safe-haven demand for yen.
The drop in oil prices exacerbated negative Canadian dollar sentiment following last week’s more dovish than expected Bank of Canada policy meeting. Traders were unhappy with BoC downgrading 2021 economic growth to 6.0% from 6.5% in April, and took it out on the currency.
USD/CAD technicals are bullish while trading above $1.2405, supported by the break above the downtrend line from last November. The break above $1.2650 overnight sets the stage for a test of $1.3000.
Widespread safe-haven demand for U.S. dollars made the Canadian dollar the worst-performing currency compared to the U.S. dollar. The Australian and New Zealand dollars were not far behind, losing 1.0% and 0.77% respectively.
USD/JPY dropped from 110.09 to 109.62 due to U.S. 10-year Treasury yields falling to 1.248% from 1.30%, and safe-haven demand for yen.
EURUSD is trading at key support after dropping from 1.1813 to 1.1766 overnight. Risk-aversion pressures are exacerbated by new COVID-19 restrictions in France, and Germany, and due to economic growth concerns from flooding in many areas. Traders are also worried about the European Central Bank meeting on Thursday, especially when recent Consumer Price Index reports highlighted the divergent inflation rates between the U.S. and Eurozone.
GBPUSD fell to $1.3702 from $1.3773 as slowing U.K. growth fears exacerbated the risk-aversion fueled selloff. However, GBP/USD as strong support in the $1.36750 zone.
AUD/USD underperformed as delta-variant coronavirus outbreaks, soft commodity prices, and last week’s dovish Reserve Bank of Australia policy meeting weigh on prices. NZD/USD traded lower but outperformed AUD/USD.
There are no economic reports of note today.
Rahim Madhavji is the President of KnightsbridgeFX.com, a Canadian currency exchange that provides better rates than the banks to Canadians
Agreement will boost production by 2 million barrels per day by the end of 2021
The Associated Press ·
OPEC and allied nations agreed Sunday to raise the production limits imposed on five countries next year and boost their production by two million barrels per day by the end of this year, ending a dispute that roiled oil markets.
The disagreement, sparked by a demand by the United Arab Emirates to increase its own production, temporarily upended an earlier meeting of the cartel. In a statement Sunday, the cartel announced that Iraq, Kuwait, Russia, Saudi Arabia and the UAE would see their limits rise.
"What bonds us together is way much beyond what you may imagine," Saudi Energy Minister Prince Abdulaziz bin Salman said. "We differ here and there but we bond."
Prince Abdulaziz declined to elaborate on how they came to that consensus, saying it would see the cartel "lose our advantage of being mysterious and clever." But he clearly bristled at earlier reports on the dispute between Saudi Arabia, long the heavyweight of the Vienna-based cartel, and the UAE.
Prince Abdulaziz deferred at the beginning of a news conference afterward to UAE Energy Minister Suhail al-Mazrouei in a sign of respect.
"The UAE is committed to this group and will always work with it and within this group to do our best to achieve the market balance and help everyone," al-Mazrouei said. He praised the deal as a "full agreement" among all the parties.
Outside of OPEC, however, tensions still remain between the neighboring nations. The UAE largely has withdrawn from the Saudi-led war in Yemen, while also diplomatically recognizing Israel. Saudi Arabia also has opened its doors to Qatar again after a yearslong boycott, though relations remain icy between Abu Dhabi and Doha. Saudi Arabia also has aggressively sought international business headquarters — something that could affect the UAE's business hub Dubai.
Abu Dhabi's powerful Crown Prince Mohammed bin Zayed, the country's de facto ruler, and Saudi Crown Prince Mohammed bin Salman have been close though over the years. The two leaders likely will meet Monday in Saudi Arabia.
New production limits
Under the new production limits, the UAE would be able to produce up to 3.5 million barrels of crude oil a day beginning in May 2022. That's below the 3.8 million barrels a day it reportedly sought. Saudi Arabia's limit of 11 million barrels a day would rise to 11.5 million, as would Russia's. Iraq and Kuwait saw smaller increases.
In its statement, OPEC acknowledged oil prices continued to improve.
"Economic recovery continued in most parts of the world with the help of accelerating vaccination programs," the cartel said.
Prince Abdulaziz also mentioned OPEC members Algeria and Nigeria had raised concerns about their production limits as well.
Oil prices collapsed amid the coronavirus pandemic as demand for jet fuel and gasoline dropped amid lockdowns across the globe, briefly seeing oil futures trade in the negatives. Demand since has rebounded as vaccines, while still distributed unequally across the globe, reach arms in major world economies.
Benchmark Brent crude oil traded around $73 a barrel Friday.
Once muscular enough to grind the U.S. to a halt with its 1970s oil embargo, OPEC needed non-members like Russia to push through a production cut in 2016 after prices crashed below $30 a barrel amid rising American production. That agreement in 2016 gave birth to the so-called OPEC+, which joined the cartel in cutting production to help stimulate prices.
OPEC+ agreed in 2020 to cut a record 10 million barrels of crude a day from the market to boost prices. It's slowly added some 4.2 million barrels back over time.
Beginning this August, the cartel said it separately will increase its production by 400,000 barrels a day each month through December — a total of 2 million barrels. The cartel then will assess plans on whether to phase out its current 5.8 million barrel of oil production cut by the end of 2022 as planned by the initial agreement.
OPEC member nations include Algeria, Angola, Congo, Equatorial Guinea, Gabon, Iran, Iraq, Kuwait, Libya, Nigeria, Saudi Arabia, the UAE and Venezuela. Members of the so-called OPEC+ include Azerbaijan, Bahrain, Brunei, Kazakhstan, Malaysia, Mexico, Oman, Russia, Sudan and South Sudan.
Prince Abdulaziz, in praising Sunday's agreement, offered a cheery assessment of the future despite the recent turmoil, suggesting at one point the enlarged group might last beyond the expiration of the cuts next year.
The Toronto Stock Exchange had its worst day in months on Monday as rising COVID-19 infections around the world gave investors a sobering reminder that the pandemic is still far from over.
The S&P/TSX composite index lost more than 350 points, or almost two per cent, to 19,655 nearing the end of the trading day.
Less than a month ago, Canada's benchmark stock index was hitting all-time highs as optimism over the looming end of COVID-19 had investors pouring money into stocks poised to benefit from the reopening of the global economy. Even as recently as last week, the TSX was nearly 1,000 points higher than it is right now.
But the pandemic numbers have become a lot gloomier since then, as the delta variant has caused cases to rise again in the U.S., Europe and elsewhere.
"Risk aversion is firmly in place as the delta variant spread is triggering a flight to safety as global economic concerns intensify," said Edward Moya, a strategist with the investment firm Oanda.
The price of oil cratered to $66 a barrel, losing almost eight per cent, after the oil cartel known as OPEC announced over the weekend it would soon pump two million more barrels of oil every day. Oil companies make up a big chunk of the TSX, so the sell-off in those shares made a bad day even worse for the index.
"There was a general market sell-off related to renewed worries about COVID and delta," said Rory Johnston, managing director with the investment firm Price Street.
"Oil is a very classic risk asset, so it's going to ease off a bit," he said in an interview.
The sell-off was even more pronounced in the U.S., where the Dow Jones Industrial Average was at one point down by almost 1,000 points, or just shy of three per cent.
Randy Ollenberger, an analyst with Bank of Montreal, said the sell-off makes sense.
"There's a lot of nervousness with what's going on with the variants," he said in an interview. "We are not completely out of the woods yet, so we are going to have these days."
Sectors that stood to gain the most from getting back to normal — like travel, tourism, energy and commodities — were hit hardest.
"Travel and hotel stocks are getting crushed today as concerns grow that crude demand outlook might have overly priced in a normal summer abroad," Moya said. "Jet fuel demand will struggle as international travel is not happening anytime soon."
Others weren't so gloomy.
Barry Schwartz, chief investment officer with the Toronto-based Baskin Financial, said in an interview that Monday's sell-off is likely a temporary blip on the broader path toward economic recovery. He notes that prior to Monday's sell-off, the TSX was up by almost 20 per cent this year.
"Things got ahead of themselves," he said. "The economy is rebounding, [but] it's not going to be in a straight line."
He blamed most of the sell-off on automated trading algorithms programmed to follow momentum — and end up feeding on themselves.
"Even with delta, you have to be much more positive on the world than where we were a year ago."
