Unverified50% confidenceFactExact time
COALESCE returns the first non-NULL value in the argument list, and is commonly used to set default values.
1
Sources
50%
Confidence
Long-term
Relevance
9/12/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedIf the result of a NOT IN subquery contains any NULL, the entire query returns an empty set; therefore, using NOT EXISTS instead is recommended.63% similarUnverified使用列表嵌套字典的方式为不同核函数指定各自的有效参数，可将参数组合数从144降到不足10个57% similarUnverifiedUsing ASSERT_* for preconditions that subsequent assertions depend on, and EXPECT_* for independently verifiable checkpoints, is a common best practice.55% similarUnverifiedThe before_model method of the safety-check middleware has a return type of Dict | None, while the logging middleware has a return type of None.55% similarUnverifiedPostgreSQL treats NULL as the largest value by default, placing it at the end in ascending order and at the beginning in descending order.55% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/910662API
curl https://kongchang.com/api/v1/knowledge/claims/910662MCP
get_claim(id=910662)