CASE selector WHEN selector_value_1 THEN statements_1 WHEN selector_value_1 THEN statement_2 ... ELSE else_statements END CASE; Code language: PostgreSQL SQL dialect and PL/pgSQL (pgsql) Let’s examine the syntax of the simple CASE statement in detail: 1) selector The selector is an...
是一种在SQL语句中使用Case语句来进行条件判断和结果返回的技术。Case语句可以根据条件的不同返回不同的结果,类似于编程语言中的switch语句。 在SQL查询中,Case语句通常用于根据特定条...
(list_price - standard_cost) *100/ list_price,2) <12;Code language:SQL (Structured Query Language)(sql) Try it The followingUPDATEstatement uses theCASEexpression to update the list price of the products whose gross margin is less than 12% to list prices that make their gross margin 12%...
参考上面的章节修改源码 src/include/pg_config_manual.h ,支持单个索引放128个字段。 export USE_NAMED_POSIX_SEMAPHORES=1LIBS=-lpthread CFLAGS="-O3" ./configure--prefix=/home/digoal/pgsql12LIBS=-lpthread CFLAGS="-O3" make world -j128LIBS=-lpthread CFLAGS="-O3" make install-world ...
pg_federation_repeatable_read query_group search_path spectrum_enable_pseudo_columns enable_spectrum_oid spectrum_query_maxerror statement_timeout stored_proc_log_min_messages timezone use_fips_ssl wlm_query_slot_count Histórico do documentosGuia...
(stderr, "statement has too many arguments (maximum is %d): %s\n", MAX_ARGS - 1, raw_sql); pg_free(name); return false; } sprintf(var, "$%d", cmd->argc); p = replaceVariable(&sql, p, eaten, var); cmd->argv[cmd->argc] = name; cmd->argc++; } cmd->argv[0] = sql...
Case语句语法(MySQL):- WHEN search_condition THEN statement_listEND CASESimple CASE expression: CASE input_ 浏览3提问于2014-01-17得票数 0 回答已采纳 3回答 在SQL Case语句中正确使用嵌套Case语句 、、 下午好,Select field3, field 4, When field in (1, 3, 7) thencase< 浏览1提问于2011-03-...
(*)/b.tot::numeric >=0.25 CONTEXT: PL/pgSQL function "assoc_rules" line 141 at execute statement *** Error *** ERROR: function assoc_make_svec_sfunc(unknown, integer, integer) does not exist SQL state: 42883 Hint: No function matches the given name and argument types. You may need...
pgsql,mysqlcasewhen casewhen有两种用法: 一种是when后面是boolean值,一种是when后面是值 布尔值语法:selectCASEWHENyhsm='' THEN '非即征即退'WHENposition('即征即退' in yhsm)='1' THEN '即征即退'ELSE yhsm ENDfrom skfp_mx GROUP BY yh ...
(in_accessor,in_depth) WHERE expand_memberships = in_grantor ) AS subquery" PL/pgSQL function pprivs( [Sat Nov 10 19:01:02.990873 2018] [php7:notice] [pid 27029] [client 88.96.123.86:58688] DAViCal: LOG: Principal: Query: QF: bigint,bigint,integer) line 14 at SQL statement"...