I came across aforum postwhere someone wanted to use SQL NOT LIKE with multiple values. They were trying to exclude multiple values from the SQL query, but they were needing to use wildcards. If you wanted to just filter values without wildcards, you would use the following query. select*...
-- select customers who don't live in the USASELECT*FROMCustomersWHEREcountryNOTLIKE'USA'; Run Code Here, the SQL command selects all customers except those whosecountryisUSA. SQL LIKE With Multiple Values We can use theLIKEoperator with multiple string patterns using theORoperator. For example...
The size of the cache to hold the SQL statements for the binary log during a transaction. A binary log cache is allocated for each client if the server supports any transactional storage engines and if the server has binary log enabled(–log-bin option). If you often use big, multiple-st...
SET GLOBAL slow_query_log_file = '/var/log/mysql/sql-slow.log'; SET GLOBAL log_queries_not_using_indexes = 'ON'; SET SESSION long_query_time = 1; SET SESSION min_examined_row_limit = 100; 如何查看下慢查询日志是否开启,以及慢查询日志文件的位置: mysql> show variables like '%slow_quer...
SQL Like Multiple Conditions We can specify multiple conditions in the LIKE operator using SQL’s logical operators. The code syntax is as shown below: An example is as shown: In the above code, we use the OR operator to specify multiple conditions using the OR operator. ...
5. Not using temporary tables for complex queries SQL would be great if only we could debug queries. What if I told you can debug them! You can breakdown a complex query and create multiple temporary tables. Then you can run “sanity check” queries against those tables to make sure they...
动态SQl之<if> 我们根据实体类的不同取值，使用不同的 SQL语句来进行查询。比如在 id如果不为空时...
4.Which of following will be used to join rows with other tables if the column values fall in a range defined by inequality operators?Equijoin Simple join Non-equijoin None of the aboveAnswer: C. Equijoins use equality operators to join rows, non-equijoins use inequality operators....
mysql> select distinct tiny_column from big_table limit 2; mysql> -- Returns the unique combinations of values from multiple columns. mysql> select distinct tiny_column, int_column from big_table limit 2; distinct可以和聚合函数(通常是count函数)一同使用,count(disitnct)用于计算出一个列或多个...
{"select#":1,"steps":\[{"condition\_processing":{"condition":"WHERE","original\_condition":"(\`tbl\_customer\_recharge\_record\`.\`customer\_id\` = 1)","steps":\[{"transformation":"equality\_propagation","resulting\_condition":"multiple equal(1, \`tbl\_customer\_recharge\_record...